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Enlarge / The Ariane 5 has been a workhorse since 1996 for the European Space Agency. (credit: ESA/Arianespace)
The Ariane 5 rocket has had a long run, with nearly three decades of service launching satellites and spacecraft. Over that time, the iconic rocket, with a liquid hydrogen-fueled core stage and solid rocket boosters, has come to symbolize Europe's guaranteed access to space.
But now, the road is ending for the Ariane 5. As soon as Tuesday evening, the final Ariane 5 rocket will lift off from Kourou, French Guiana, carrying a French military communications satellite and a German communications satellite to geostationary transfer orbit. A 90-minute launch window opens at 5:30 pm ET (21:30 UTC). The launch will be webcast on ESA TV.
And after this? Europe's space agency faces some difficult questions.
On late Saturday morning, a SpaceX Falcon 9 rocket carrying the European Space Agency’s Euclid spacecraft successfully lifted off Cape Canaveral, Florida. The near-infrared telescope, named after the ancient Greek mathematician who is widely considered the father of geometry, will study how dark matter and dark energy shape the universe.
In addition to a 600-megapixel camera astronomers will use to image a third of the night sky over the next six years, Euclid is equipped with a near-infrared spectrometer and photometer for measuring the redshift of galaxies. In conjunction with data from ground observatories, that information will assist scientists with estimating the distance between different galaxies. As The New York Times notes, one hope of physicists is that Euclid will allow them to determine whether Albert Einstein’s theory of general relativity works differently on a cosmic scale. There’s a genuine possibility the spacecraft could revolutionize our understanding of physics and even offer a glimpse of the ultimate fate of the universe.
👋 Safe travels, #ESAEuclid!
— ESA's Euclid mission (@ESA_Euclid) July 1, 2023
The #DarkUniverse 🕵️♂️ detective ventures into the unknown. pic.twitter.com/JvWBpIz4Sx
“If we want to understand the universe we live in, we need to uncover the nature of dark matter and dark energy and understand the role they played in shaping our cosmos,” said Carole Mundell, the ESA’s director of science. “To address these fundamental questions, Euclid will deliver the most detailed map of the extra-galactic sky.”
With Euclid now in space, it will travel approximately a million miles to the solar system’s second Lagrange point. That’s the same area of space where the James Webb Space Telescope has been operating for the past year. It will take Euclid about a month to travel there, and another three months for the ESA to test the spacecraft’s instruments before Euclid can begin sending data back to Earth.
This article originally appeared on Engadget at https://www.engadget.com/europes-euclid-space-telescope-launches-to-map-the-dark-universe-175331413.html?src=rss
Euclid launch
A shot of the Euclid space telescope against the dark of space.
Enlarge / SpaceX's Falcon 9 rocket soars through the sky over Cape Canaveral with Europe's Euclid space telescope. (credit: Stephen Clark/Ars Technica)
A European Space Agency telescope launched Saturday on top of a SpaceX Falcon 9 rocket from Florida to begin a $1.5 billion mission seeking to answer fundamental questions about the unseen forces driving the expansion of the Universe. The Euclid telescope, named for the ancient Greek mathematician, will observe billions of galaxies during its six-year survey of the sky, measuring their shapes and positions going back 10 billion years, more than 70 percent of cosmic history.
Led by the European Space Agency, the Euclid mission has the ambitious goal of helping astronomers and cosmologists learn about the properties and influence of dark matter and dark energy, which are thought to make up about 95 percent of the Universe. The rest of the cosmos is made of regular atoms and molecules that we can see and touch.
“To highlight the challenge we face, I would like to give the analogy: It’s very difficult to find a black cat in a dark room, especially if there’s no cat,” said Henk Hoekstra, a professor and cosmologist at Leiden Observatory in the Netherlands. “That’s a little bit of the situation we find ourselves in because we have these observations … But we lack a good theory. So far, nobody has come up with a good explanation for dark matter or dark energy.”
Enlarge / Saturn stars in this near-infrared image taken June 25 by the James Webb Space Telescope. (credit: NASA/ESA/CSA/STSci)
The James Webb Space Telescope has observed Saturn for the first time, completing a family portrait of the Solar System’s ringed planets nearly a year after the mission’s first jaw-dropping image release.
Webb’s near-infrared camera took the picture of Saturn on June 25. Scientists added orange color to the monochrome picture to produce the image released Friday.
The picture shows Saturn’s iconic icy rings shining around the disk of the gas giant, which appears much darker in near-infrared due to the absorption of sunlight by methane particles suspended high in the planet’s atmosphere.
“Get yourself a little studietto where no one will bother you at all.”
—Cennino Cennini, Book of Art, c. 1400s
A delightful bit from Tom Stammers’ review of David Hall’s The Artist’s Studio: A Cultural History:
it’s helpful to know that the term ‘studio’ derives from a verb as well as a noun. Studiolo denoted the scholar’s study or cabinet, but there was also studiare, linked to a certain kind of diligent or pleasurable work, which could take place anywhere.
Another interesting bit on the difference between a “studio” and a “workshop”:
The idea that the artist’s studio was somehow different from the artisan’s workshop took off in the 15th century. In Hall’s phrase, ‘the Renaissance concept of the studio involved a literal and symbolic turning away from the street.’ The most skilful and profitable craftsman of the Middle Ages was the goldsmith, whose reputation for honest dealing was predicated on the transparency of his working practices. Goldsmiths’ shops were open to the street, and to watching customers. By contrast, the 15th-century artist’s studio was premised on a measure of secrecy.
I like this tension between “studio” and “workshop.” I would like to think of my space as serving both functions, occupying a place somewhere in the middle — a place I go to be, by myself, but also a place where the people are free to visit me. (I love a good visit.)
But even before I built my current studio, I knew that a great deal of my work “could take place anywhere,” and indeed, a great deal of it takes place, as it did before, in the morning at the kitchen table.
The discovery of tiny salt grains in an asteroid sample provides strong evidence that liquid water may be more common in the solar system’s largest asteroid population than previously thought.
The smattering of tiny salt crystals discovered in a sample from an asteroid has researchers excited, because these crystals can only have formed in the presence of liquid water.
Even more intriguing, according to the research team, is the fact that the sample comes from an S-type asteroid, a category known to mostly lack hydrated, or water-bearing, minerals. The discovery strongly suggests that a large population of asteroids hurtling through the solar system may not be as dry as previously thought. The finding, published in Nature Astronomy, gives renewed push to the hypothesis that most, if not all, water on Earth may have arrived by way of asteroids during the planet’s tumultuous infancy.
“Once these ingredients come together to form asteroids, there is a potential for liquid water to form.”
Tom Zega, the study’s senior author and a professor of planetary sciences at the the University of Arizona Lunar and Planetary Laboratory, and Shaofan Che, lead study author and a postdoctoral fellow at the Lunar and Planetary Laboratory, performed a detailed analysis of samples collected from asteroid Itokawa in 2005 by the Japanese Hayabusa mission and brought to Earth in 2010.
The study is the first to prove that the salt crystals originated on the asteroid’s parent body, ruling out any possibility they might have formed as a consequence of contamination after the sample reached Earth, a question that had plagued previous studies that found sodium chloride in meteorites of a similar origin.
“The grains look exactly like what you would see if you took table salt at home and placed it under an electron microscope,” Zega says. “They’re these nice, square crystals. It was funny, too, because we had many spirited group meeting conversations about them, because it was just so unreal.”
Zega says the samples represent a type of extraterrestrial rock known as an ordinary chondrite. Derived from so-called S-type asteroids such as Itokawa, this type makes up about 87% of meteorites collected on Earth. Very few of them have been found to contain water-bearing minerals.
“It has long been thought that ordinary chondrites are an unlikely source of water on Earth,” says Zega who is the director of the Lunar and Planetary Laboratory’s Kuiper Materials Imaging & Characterization Facility. “Our discovery of sodium chloride tells us this asteroid population could harbor much more water than we thought.”
Today, scientists largely agree that Earth, along with other rocky planets such as Venus and Mars, formed in the inner region of the roiling, swirling cloud of gas and dust around the young sun, known as the solar nebula, where temperatures were very high—too high for water vapor to condense from the gas, according to Che.
“In other words, the water here on Earth had to be delivered from the outer reaches of the solar nebula, where temperatures were much colder and allowed water to exist, most likely in the form of ice,” Che says. “The most likely scenario is that comets or another type of asteroid known as C-type asteroids, which resided farther out in the solar nebula, migrated inward and delivered their watery cargo by impacting the young Earth.”
The discovery that water could have been present in ordinary chondrites, and therefore been sourced from much closer to the sun than their “wetter” kin, has implications for any scenario attempting to explain the delivery of water to the early Earth.
The sample used in the study is a tiny dust particle spanning about 150 micrometers, or roughly twice the diameter of a human hair, from which the team cut a small section about 5 microns wide—just large enough to cover a single yeast cell—for the analysis.
Using a variety of techniques, Che was able to rule out that the sodium chloride was the result of contamination from sources such as human sweat, the sample preparation process, or exposure to laboratory moisture.
Because the sample had been stored for five years, the team took before and after photos and compared them. The photos showed that the distribution of sodium chloride grains inside the sample had not changed, ruling out the possibility that any of the grains were deposited into the sample during that time. In addition, Che performed a control experiment by treating a set of terrestrial rock samples the same as the Itokawa sample and examining them with an electron microscope.
“The terrestrial samples did not contain any sodium chloride, so that convinced us the salt in our sample is native to the asteroid Itokawa,” he says. “We ruled out every possible source of contamination.”
Zega says tons of extraterrestrial matter is raining down on Earth every day, but most of it burns up in the atmosphere and never makes it to the surface.
“You need a large enough rock to survive entry and deliver that water,” he says.
Previous work led by the late Michael Drake, a former director of the Lunar and Planetary Lab, in the 1990s proposed a mechanism by which water molecules in the early solar system could become trapped in asteroid minerals and even survive an impact on Earth.
“Those studies suggest several oceans worth of water could be delivered just by this mechanism,” Zega says. “If it now turns out that the most common asteroids may be much ‘wetter’ than we thought, that will make the water delivery hypothesis by asteroids even more plausible.”
Itokawa is a peanut-shaped near-Earth asteroid about 2,000 feet long and 750 feet in diameter and is believed to have broken off from a much larger parent body. According to Che and Zega, it is conceivable that frozen water and frozen hydrogen chloride could have accumulated there, and that naturally occurring decay of radioactive elements and frequent bombardment by meteorites during the solar system’s early days could have provided enough heat to sustain hydrothermal processes involving liquid water. Ultimately, the parent body would have succumbed to the pummeling and broken up into smaller fragments, leading to the formation of Itokawa.
“Once these ingredients come together to form asteroids, there is a potential for liquid water to form,” Zega says. “And once you have liquids form, you can think of them as occupying cavities in the asteroid, and potentially do water chemistry.”
The evidence pointing at the salt crystals in the Itokawa sample as being there since the beginning of the solar system does not end here, however. The researchers found a vein of plagioclase, a sodium-rich silicate mineral, running through the sample, enriched with sodium chloride.
“When we see such alteration veins in terrestrial samples, we know they formed by aqueous alteration, which means it must involve water,” Che says. “The fact that we see that texture associated with sodium and chlorine is another strong piece of evidence that this happened on the asteroid as water was coursing through this sodium-bearing silicate.”
Source: University of Arizona
The post Salt on Itokawa asteroid suggests liquid water appeared first on Futurity.
Astronomers are using NASA’s James Webb Space Telescope to peer deeper into the universe and farther back in time than ever before.
Already, the team has discovered hundreds of galaxies that existed when the universe was less than 600 million years old—just 4% of its current age.
The Webb Telescope, or JWST, also has observed galaxies sparkling with a multitude of young, hot stars formed during what researchers call “surprisingly episodic bursts of star formation.”
They made the observations as part of the JWST Advanced Deep Extragalactic Survey, or JADES, which is dedicated to uncovering and studying extremely faint, distant galaxies. Thirty-two days of observing time have been devoted to JADES, which is one of the largest observing programs in Webb’s first year of science.
The key to JWST’s ability to sniff out the extremely faint signatures of distant objects is its large, light-gathering mirror and infrared sensitivity.
“With JADES, we want to answer questions such as, ‘How did the earliest galaxies assemble themselves? How fast did they form stars? Why do some galaxies stop forming stars?'” says Marcia Rieke, a professor of astronomy at the University of Arizona Steward Observatory and a co-lead of the JADES program.
During his doctoral research at Steward Observatory, JADES team member Ryan Endsley, who is now a postdoctoral fellow at the University of Texas at Austin, led an investigation into galaxies that existed 500 to 850 million years after the Big Bang, a crucial time known as the “Epoch of Reionization.”
“Star formation in the early universe is much more complicated than we thought.”
For hundreds of millions of years, the young universe was filled with a gaseous fog that made it opaque to energetic light such as ultraviolet light or X-rays. About 1 billion years after the Big Bang, the fog had cleared and the universe became transparent during a process known as reionization.
Scientists have debated whether active, supermassive black holes or galaxies full of hot, young stars were the primary cause of reionization. As part of the JADES program, Endsley and his colleagues studied these galaxies specifically to look for signatures of star formation—and found them in abundance.
“Almost every single galaxy that we are finding shows these unusually strong emission line signatures indicating intense recent star formation,” Endsley says. “These early galaxies were very good at creating hot, massive stars.”
These bright, massive stars pumped out torrents of ultraviolet light, which transformed surrounding gas from opaque to transparent by ionizing atoms, unbinding their electrons from the nuclei. Since these early galaxies had such a large population of hot, massive stars, they may have been the main driver of the reionization process. The later reuniting of the electrons and nuclei produces the distinctively strong emission lines.
Endsley and his colleagues also found evidence that these young galaxies underwent periods of rapid star formation interspersed with quiet periods during which fewer stars formed. These fits and starts may have occurred as galaxies captured clumps of the gaseous raw materials needed to form stars. Alternatively, since massive stars are short-lived before they explode, they may have injected energy into the surrounding environment periodically, preventing gas from condensing to form new stars.
Another element of the JADES program involves the search for the earliest galaxies that existed when the universe was less than 400 million years old. By studying these galaxies, astronomers can explore how star formation in the early years after the Big Bang was different from today. The light from faraway galaxies is stretched to longer wavelengths and redder colors by the expansion of the universe—a phenomenon called redshift. By measuring a galaxy’s redshift, astronomers can learn how far away it is and, therefore, at what time it existed in the early universe.
“Before JWST, there were only a few dozen galaxies observed above a redshift of 8, when the universe was younger than 650 million years old, but JADES is now uncovering nearly a thousand of these extremely distant galaxies,” Rieke says.
The JADES team identified more than 700 candidate galaxies above redshift 8, which will completely overhaul astronomers’ understanding of early galaxy formation. The sheer number of these sources far exceeded predictions based on observations made before the launch of JWST. Webb’s fine resolution and sensitivity allow astronomers to get an unprecedented view of these distant galaxies.
“Previously, the earliest galaxies we could see just looked like little smudges,” says JADES team member Kevin Hainline, an assistant research professor at Steward Observatory. “And yet those smudges represent millions, or even billions, of stars at the beginning of the universe. Now, we can see, incredibly, that some of them are actually groupings of stars being born only a few hundred million years after the beginning of time.”
“What all this tells us,” Rieke says, “is that star formation in the early universe is much more complicated than we thought.”
The team presented their latest observations at the 242nd meeting of the American Astronomical Society in Albuquerque, New Mexico.
Source: University of Arizona
The post Webb Telescope reveals hundreds of galaxies from infant universe appeared first on Futurity.
Elon Musk, Mars, and bioethics: is sending astronauts into space ethical?
The recent crash of the largest-ever space rocket, Starship, developed by Elon Musk’s SpaceX company, has certainly somewhat disrupted optimism about the human mission to Mars that is being prepared for the next few years. It is worth raising the issue of the safety of future participants in long-term space missions, especially missions to Mars, on the background of this disaster. And it is not just about safety from disasters like the one that happened to Musk. Protection from the negative effects of prolonged flight in zero gravity, protection from cosmic radiation, as well as guaranteeing sufficiently high crew productivity over the course of a multi-year mission also play an important role.
Fortunately, no one was killed in the aforementioned crash, as it was a test rocket alone without a crew. However, past disasters in which astronauts died, such as the Space Shuttle Challenger and Space Shuttle Columbia disasters, remind us that it is the seemingly very small details that determine life and death. So far, 15 astronauts and 4 cosmonauts have died in space flights. 11 more have died during testing and training on Earth. It is worth mentioning that space flights are peacekeeping missions, not military operations. They are carried out relatively infrequently and by a relatively small number of people.
It is also worth noting the upcoming longer and more complex human missions in the near future, such as the mission to Mars. The flight itself, which is expected to last several months, is quite a challenge, and disaster can happen both during takeoff on Earth, landing on Mars, and then on the way back to Earth. And then there are further risks that await astronauts in space.
The first is exposure to galactic cosmic radiation and solar energetic particles events, especially during interplanetary flight, when the crew is no longer protected by both Earth’s magnetic field and a possible shelter on Mars. Protection from cosmic radiation for travel to Mars is a major challenge, and 100% effective protective measures are still lacking. Another challenge remains being in long-term zero-gravity conditions during the flight, followed by altered gravity on Mars. Bone loss and muscle atrophy are the main, but not only, negative effects of being in these states. Finally, it is impossible to ignore the importance of psychological factors related to stress, isolation, being in an enclosed small space, distance from Earth.
A human mission to Mars, which could take about three years, brings with it a new type of danger not known from the previous history of human space exploration. In addition to the aforementioned amplified impact of factors already known—namely microgravity, cosmic radiation, and isolation—entirely new risk factors are emerging. One of them is the impossibility of evacuating astronauts in need back to Earth, which is possible in missions carried out at the International Space Station. It seems that even the best-equipped and trained crew may not be able to guarantee adequate assistance to an injured or ill astronaut, which could lead to her death—assuming that care on Earth would guarantee her survival and recovery. Another problem is the delay in communication, which will reach tens of minutes between Earth and Mars. This situation will affect the degree of autonomy of the crew, but also their responsibility. Wrong decisions, made under conditions of uncertainty, can have not only negative consequences for health and life, but also for the entire mission.
“It is worth raising the question of the ethicality of the decision to send humans into such a dangerous environment.”
Thus, we can see that a future human mission to Mars will be very dangerous, both as a result of factors already known but intensified, as well as new risk factors. It is worth raising the question of the ethicality of the decision to send humans into such a dangerous environment. The ethical assessment will depend both on the effectiveness of available countermeasures against harmful factors in space and also on the desirability and justification for the space missions themselves.
Military ethics and bioethics may provide some analogy here. In civilian ethics and bioethics, we do not accept a way of thinking and acting that would mandate the subordination of the welfare, rights, and health of the individual to the interests of the group. In military ethics, however, this way of thinking is accepted, formally in the name of the higher good. Thus, if the mission to Mars is a civilian mission, carried out on the basis of values inherent in civilian ethics and bioethics rather than military ethics, it may be difficult to justify exposing astronauts to serious risks of death, accident, and disease.
One alternative may be to significantly postpone the mission until breakthrough advances in space technology and medicine can eliminate or significantly reduce the aforementioned risk factors. Another alternative may be to try to improve astronauts through biomedical human enhancements. Just as in the army there are known methods of improving the performance of soldiers through pharmacological means, analogous methods could be applied to future participants in a mission to Mars. Perhaps more radical, and thus controversial, methods such as gene editing would be effective, assuming that gene editing of selected genes can enhance resistance to selected risk factors in space.
But the idea of genetically modifying astronauts, otherwise quite commonsensical, given also the cost of such a mission, as well as the fact that future astronauts sent to Mars would likely be considered representative of the great effort of all humanity, raises questions about the justification for such a mission. What do the organizers of a mission to Mars expect to achieve? Among the goals traditionally mentioned are the scientific merits of such a mission, followed by possible commercial applications for the future. Philosophers, as well as researchers of global and existential catastrophes, often discuss the concept of space refuge, in which the salvation of the human species in the event of a global catastrophe on Earth would be possible only by settling somewhere beyond Earth. However, it seems that the real goals in our non-ideal society will be political and military.
For the past 40 years, my mother, Lynne Cohen,* has gone swimming several times a week at her local pool in Ottawa. Beginning in her teens and continuing off and on throughout her life, she swam competitively on teams and in triathlons. Her local pool has served both as her training ground and as her go-to for regular exercise. After decades, she knows most of the other regular swimmers, some of whom have become good friends. The pool has been a central part of her life for years now, but last month her once innocuous activity became unsafe.
Last week, as always, my mother finished her swim and went to the changerooms to shower. She and the other ladies — also regulars at the Nepean Sportsplex — chatted in the showers, catching up on news as they always do. My mother wrapped herself in a towel as she stepped out of the shower. There, facing away from her, was a naked man. Shocked, my mother hurried over to a corner of the changeroom to get dressed. The man, now standing across the changeroom, was over six feet tall, with a combover. He got dressed, turned around and leered at her, then left the changeroom.
Shaken, my mother rushed over to her friend, asking if she had seen “the man in the women’s changeroom.” The other woman nervously confirmed that yes, she had. They continued their conversation in hushed voices, afraid and feeling violated, yet did not mention a thing to community centre staff.
My mother is 66 years old and no shrinking violet. A longtime journalist in Ottawa, her writing reflects her heterodox views and tenacity for challenging dominant narratives. I have never known her in any circumstance to shy away from confrontation. In the decades she has been swimming at this pool, she has had several run-ins with the lifeguards, management, and other swimmers. From too-slow swimmers clogging up the fast lane to the Covid-related mask mandates, my mother has always fearlessly spoken her mind. During Covid, she fought back so relentlessly against having to wear a mask on the pool deck for the few minutes before entering the water that we worried she might end up in handcuffs. She wasn’t charged, but she did face a short-term suspension from all City of Ottawa pools as a result of her protests.
Yet when a man walked naked through the changeroom while she was in her most vulnerable state, my mother went silent.
Ten years ago, this incident would have been viewed unequivocally as a crime. Someone would have called the police, and the man would have been arrested. He would have been labelled a sexual predator and likely charged with voyeurism. But today, not one woman in the changeroom dared speak up, complain, or request help from staff in dealing with the issue.
These women would have very recently been considered the vulnerable population in this situation, and had the power of both social norms and the law on their side, yet now were self-silencing. Why?
We all know why: with four magic words — “I am a woman” — the intruder and potential predator becomes the vulnerable one, thereby protected from criticism, punishment, or accountability. Today’s political climate demands he be welcomed with open and loving arms into the female-only spaces, and that anyone who says different is labelled not only insensitive, but hateful.
The most astounding part of this story is that no one in the changeroom even asked if he identified as a man or a woman. For all anyone knows, this anatomically male individual may have been totally unaware that he had access to a convenient loophole. For all we know he might have answered, “Of course I’m a man, but I wanted to undress in the women’s changeroom.” Why then, did not a single woman say anything?
After my mother told me what happened to her, my initial reaction, like that of my father’s, was outrage. I was furious. To my mind, she was the victim of a crime. I kept asking her, “Why didn’t you say something?” Her answer was, “What’s the point?”
For the rest of the day, I was disturbed and shaken. I had to force the incident out of my mind just to function, to take care of my kids, to act normal. I was afraid not only for my mother, for myself, and for my daughter (how could I ever safely take her to the pool or any other place where she would have to undress, knowing at any moment she could be exposed to a naked man?), but for the entire world.
There is a saying, “Where there is no God, there is absurdity.” I am a religious person and believe this statement in a literal sense. I believe that human beings are not only physical beings, but deeply spiritual ones. Once our food and shelter are managed, we search for meaning. Humans have souls that require sustenance just as our stomachs do. A Higher Power and religion meet the needs of our spiritual longing and free our minds to deal with this physical world and all of its infinite challenges.
But I also believe that in this quote “God” can be interpreted to mean “objective and universal truths” — transcendent truths, immune to the whims of man. Where there is no truth, there is absurdity.
Postmodernism and gender ideology have helped society cast off the chains of objective, universal and verifiable truths. Mercurial self-identification is now the North Star that guides us. We left God and are now knee-deep in absurdity.
I won’t even address the massive issue that is decades of hard fought for women’s rights eroded within just a handful of years on account of gender ideology and the belief that “trans women are women.” Many more intelligent and stronger women have taken this issue head on.
I’m just a little person: a stay-at-home mom trying to launch each one of my children into this world. But what is a world or society where a woman is violated and can’t speak up because everyone will turn on her and call her a bigot? Where a person cannot name a crime and perpetrator? Where a person cannot speak the truth about the reality before her eyes?
We’ve become two different peoples speaking two very different languages and believing in two modes of living. One camp believes in some form of objective truth and labels humans as either male or female. There are endless variations in the ways that humans express themselves, but there are only two sexes. The other camp believes in a post-modernist version of constructed truth and that there are dozens of “fluid” genders that negate sex and biology. They also believe that anyone who does not subscribe to this belief is a heretic and as evil as a Nazi.
How do these two camps speak to one another? The two belief systems require very different laws and social norms. If there are only two sexes, the man in my mother’s story is not allowed in the women’s changeroom. If sex is a social construct and can change through self-declaration or self-perception, that man can be a woman and is therefore allowed in the women’s changeroom. Today, it seems the latter camp has won, and we no longer share a common understanding of basic truths or even of language. Words like “man” or “woman” that were once universal are no longer.
A society that does not have a shared language cannot share thoughts. A society that is divided on whether or not there is an objective truth, outside of our own feelings and emotions, cannot set laws or policies that work for the broadest range of people.
A society where women and girls are cowed into silence when a crime is perpetrated against them for fear of being labelled the enemy is a shaky society indeed.
*Editor’s note: Lynne Cohen, the author’s mother, gave permission to publish her full name in this piece on June 11, 2023, after original publication.
Lindsy Danzinger is a stay-at-home mom who homeschools her three children. She lives with her husband and children in Toronto, Ontario.
The post My mother is courageous, but faced with a man in her change room at Ottawa’s Nepean Sportsplex she went silent appeared first on Feminist Current.
Read more of this story at Slashdot.
Enlarge / An image of the Centaur V anomaly that occurred on March 29 during testing of the Vulcan rocket's upper stage at Marshall Space Flight Center. (credit: Anonymous source)
10:30 pm ET Update: Several hours after this article was published, Ars obtained a still image of the Centaur V anomaly that occurred on March 29 during testing of the Vulcan rocket's upper stage. The photo shows the anomaly—a fireball of hydrogen igniting—to the left of Blue Origin's rocket engine test stand.
After the author posted this photo on Twitter, United Launch Alliance chief executive Tory Bruno offered a more detailed assessment of the anomaly. "Most of what you’re seeing is insulation and smaller bits from the test rig. One piece of the hydrogen tank’s dome, about a foot square, ended up a few feet away. The test article is still inside the rig and largely intact, which will significantly help with the investigation", Bruno said via Twitter.
Original post: On the evening of March 29, at Marshall Space Flight Center in Alabama, United Launch Alliance started pressurizing the upper stage of its new Vulcan rocket. But then, suddenly, something went wrong with this Centaur upper stage.
NASA has launched an innovative air quality monitoring instrument into a fixed-rotation orbit around Earth. The tool is called TEMPO, which stands for Tropospheric Emissions Monitoring of Pollution instrument, and it keeps an eye on a handful of harmful airborne pollutants in the atmosphere, such as nitrogen dioxide, formaldehyde and ground-level ozone. These chemicals are the building blocks of smog.
TEMPO traveled to space hitched to a SpaceX Falcon 9 rocket launching from Cape Canaveral Space Force Station. NASA says the launch was completed successfully, with the atmospheric satellite separating from the rocket without any incidents. NASA acquired the appropriate signal and the agency says the instrument will begin monitoring duties in late May or early June.
Spacecraft separation confirmed! The Intelsat satellite hosting our @NASAEarth & @CenterForAstro#TEMPO mission is flying free from its @SpaceX Falcon 9 rocket and on its way to geostationary orbit. pic.twitter.com/gKYczeHqV5
— NASA (@NASA) April 7, 2023
TEMPO sits at a fixed geostationary orbit just above the equator and it measures air quality over North America every hour and measures regions spaced apart by just a few miles. This is a significant improvement to existing technologies, as current measurements are conducted within areas of 100 square miles. TEMPO should be able to take accurate measurements from neighborhood to neighborhood, giving a comprehensive view of pollution from both the macro and micro levels.
This also gives us some unique opportunities to pick up new kinds of data, such as changing pollution levels throughout rush hour, the effects of lightning on the ozone layer, the movement of pollution related to forest fires and the long-term effects of fertilizers on the atmosphere, among other data points. More information is never bad.
TEMPO is the middle child in a group of high-powered instruments tracking pollution. South Korea's Geostationary Environment Monitoring Spectrometer went up in 2020, measuring pollution over Asia, and the ESA (European Space Agency) Sentinel-4 satellite launches in 2024 to handle European and North African measurements. Other tracking satellites will eventually join TEMPO up there in the great black, including the forthcoming NASA instrument to measure the planet's crust.
You may notice that TEMPO flew into space on a SpaceX rocket and not a NASA rocket. This is by design, as the agency is testing a new business model to send crucial instruments into orbit. Paying a private company seems to be the more budget-friendly option when compared to sending up a rocket itself.
This article originally appeared on Engadget at https://www.engadget.com/nasa-launches-powerful-air-quality-monitor-to-keep-an-eagle-eye-on-pollution-170321643.html?src=rss
NASA TEMPO launch
The NASA TEMPO launch seen at night from a distance, with the rocket blazing as it takes off.
A team of researchers propose using the James Webb Space Telescope to look at five planets in the Venus Zone, a search that could reveal valuable insights into Earth’s future.
Venus floats in a nest of sulfuric acid clouds, has no water, and its surface temperatures are hot enough to melt lead. Despite being such a scorching wasteland, however, the planet is often referred to as Earth’s sister because of similarities in size, mass, density, and volume.
Earth and Venus, which both formed about 4.5 billion years ago, now sit on opposite ends of habitability. This leaves astronomers with a giant question: Is Venus Earth’s past or Earth’s future?
“It’s all about trying to understand why Earth and Venus are so different now,” says Jim Head, a professor of geological sciences at Brown University. “We have Venus to look at here, but there are solar systems out there in which we can actually compare all these different things that we want to know. It’s a whole new parameter of space to explore.”
In the study in the Astronomical Journal, Held and colleagues identify five Venus-like planets from a list of more than 300. The researchers selected these terrestrial planets orbiting other stars, called exoplanets, because they were the most likely to resemble Venus in terms of their radii, masses, densities, the shapes of their orbits, and distances from their stars.
The researchers rank the Venus-like planets depending on the brightness of the stars they orbit to increase the odds that the Webb Telescope gets the clearest view of them, enabling researchers to pull key signals from them regarding the composition of their atmospheres.
The five planets all orbit regions called the Venus Zone, which was coined by astrophysicist and study coauthor Stephen Kane from the University of California, Riverside.
The Venus Zone encompasses the region around a star where it’s too hot for a planet to have water but not too hot for it to have no atmosphere. It is similar to the concept of a habitable zone, which is a region around a star where liquid surface water could exist.
The researchers propose the planets identified in the paper as targets for the Webb telescope in 2024. Webb is NASA’s most ambitious telescope to date and is enabling scientists not only to look into the deep past of the universe but to peer into the atmospheres of exoplanets for telltale signs of what the planet is like.
Studying exoplanets in the Venus Zone could give astronomers a better understanding of whether Venus was ever habitable. The Webb observations the researchers propose, for example, may reveal biosignature gases in the atmosphere such as methane, methyl bromide, or nitrous oxide, which could signal the presence of life. The researchers also hope to see through the observations whether Venus’s lack of plate tectonics is common and whether the planet’s volcanic activity is normal.
These observations will be complemented by NASA’s two upcoming spacecraft missions to Venus. The DAVINCI mission will measure gases in the Venusian atmosphere. The VERITAS mission will enable 3D reconstructions of the landscape.
Combined, the findings will help lead to a better understanding of the Earth-Venus divergence, which could serve as a dire warning for where Earth is heading, the researchers say.
Colby Ostberg, a UC Riverside PhD student, is the study’s lead author. NASA’s Habitable Worlds Program supported the work.
Source: Brown University
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In this post, we unpack the meaning and many works of creating and maintaining digital multiples, a term we coined in our recent ethnography, A Filtered Life, to explore the multiple, dynamic expressions of self across online contexts (Nichter and Taylor 2022). This concept emerged from our ethnographic research with more than 100 college students exploring sociality, emotional expression, and online identity work. Our methods for this study included in-depth interviews, focus groups, writing prompts, and long-term participant observation in students’ social media sites.
Colette, a college junior studying marketing at a large public university, prides herself in curating clever posts across her social media. After a difficult day, her Instagram post would feature an artsy photo of a glass of wine, using her signature colors as background. On Twitter, she would post a funny meme about getting drunk. Snapchat would show a video of her drinking the wine (since the post would disappear quickly). Colette’s Facebook post would include a short narrative about why her day was hard without any mention of wine (since her parents might see it).
Posts from one weekend include a filtered close up photo on Instagram of Colette dressed in fitted jeans and a tank top taken from a flattering birds-eye angle with the caption, “Getting ready for fun with my girls (heart emoji).” On Snapchat, her photo was a blurry image of a half-empty pizza box and several crumpled tissues on her cluttered bedside table with the caption, “Had better days.” Facebook featured a candid selfie of Colette snuggling with her golden lab on the couch with the caption, “Just a quiet night at home.”
One Thursday night, Colette posted a curated photo of herself laughing with friends in front of an iconic graffiti wall in Austin that reads, “I love you so much.” Snapchat featured her bare legs in bed with a bandage and scratch marks along with the caption, “I’m a fucking mess.” On Twitter, she retweeted a popular cartoon meme of a woman falling down stairs.
These examples from Collette’s social media illustrate the strategic presentation of self across social media contexts, a process guided by site-specific affordances, social norms, and perceived audience expectations. The term “polymedia” refers to a dynamic model which incorporates the proliferation of new social media that “each acquires its own niche in people’s communicative repertoires” (Madianou 2015, 1; see also Madianou and Miller 2013). The concept of polymedia underscores that today’s users rely on an assemblage of media to accomplish their online goals.
If we consider the multiple contexts that college students traverse without factoring in social media, impression management is complicated enough. We can imagine that a typical day for college students might include interacting with peers, co-workers and supervisors, and professors in a variety of contexts such as home, campus, parties and bars, and workplaces. Once we layer in social media contexts that overlap and integrate with those offline realms, the idea of managing one’s impression, performing appropriately for the particular platform, and segregating audiences becomes infinitely more complex. Additionally, the digital multiples that one presents on various online platforms reach diverse audiences, a factor requiring consideration in the creation of a post.
Cover of A Filtered Life, by Nicole Taylor and Mimi Nichter
Engagement with multiple online contexts is not a new area of study. Tom Boellstorff has highlighted the interconnected nature of interactional contexts, arguing that digital worlds are as real as offline worlds (Boellstorff 2016). He illustrates that what we do online affects life offline, challenging a pervasive assumption in research on technology and sociality that understands “digital” and “real” as binary opposites. We found that digital multiples necessitated fluid identities—that is, being flexible in one’s presentation of self in relation to specific contexts and social spaces. Yet, the mandate to remain consistent with online and offline presentations of self further complicated the creation of digital multiples.
Here we explore the many works involved in creating and maintaining digital multiples alongside the impossible imperative of authenticity. Maintaining digital multiples required intensive labor as college students competed for likes amidst an attention economy where the half-life of a single post was short. On the one hand, site affordances, social norms, and perceived audience expectations constrained self-presentation; on the other hand, engaging across multiple sites, each with its own unique set of cultural mandates, provided an opportunity to cultivate digital multiples.
Daniel Miller and colleagues point out that since most people now engage across multiple sites, social media has become an ecology that offers many choices for sociality, ranging from small, private exchanges to public broadcasts (Miller et al. 2016). Miller and his colleagues refer to this as scalable sociality, a term they coin to describe the interconnected nature of social media, where individuals have a range of platform choices, degrees of privacy and size of audience that they want to reach. Interactive dynamics between social media users and their audience are key for understanding digital multiples.
Sociologist Erving Goffman described social life as a theater with interactions representing the interplay between actors and their audience (Goffman 1959). Goffman contends that we are always performing to create an impression for an audience. We need an audience to see our performance and a backstage area where we can both relax and do much of the work necessary to keep up appearances (Hogan 2010). Importantly, the self is not “a fixed, organic thing but a dramatic effect that emerges from a performance” (Tolentino 2019, 14). In our study, we observed that students portrayed themselves differently across social media platforms, depending on site affordances, audience expectations, and aspects of their identity they wanted to highlight.
We found that the process of constructing and maintaining digital multiples not only requires strategic tailoring by site, but also needs to be sufficiently aligned with one’s offline self and appearance to maintain an “authentic” identity. The concept of “authenticity”—revealing one’s true self—emerged as an important theme in our study. Students emphasized the importance of “being real” online as a marker of honesty, trustworthiness, and integrity. They scrutinized social media posts for signs of over-editing, a faux pau that signaled inauthenticity and elicited derision.
Among young women, authentic expression online translated into beauty practices that highlight physical appearance. The name of the game was to present both an authentic and an edited self that appeared effortlessly attractive. Successfully navigating this contradictory imperative required great skill, attention to detail, and vigilant monitoring of editing norms and feedback on posts. Men felt less pressure to post a flawlessly edited image, making it easier to achieve an appearance of authenticity. However, some still struggled with their online image and sense of self.
Both women and men were cognizant of the superficial nature of their editing practices. Students who did not edit risked critique for visible flaws and imperfections; those who did edit risked critique for being inauthentic. Successfully striking a balance between real and fake in social media was a highly valued skill and getting it right was important. This pressure underscores the importance of impressing an imagined audience, one that appears to value both perfection and authenticity, an impossible contradictory imperative.
Using social media. Image via Pexels.
Throughout A Filtered Life, we highlight the many works involved in creating and maintaining digital multiples, which include the following: editing work, the work of identity and gender performance, beauty work, emotional work, the work of remaining visible, and the work of managing social relationships. This is mostly invisible labor. Editing work, for example, is an intricate process for perfecting social media content, involving taking multiple photos, attending to angles, lighting, posture, spacing, and background, as well as editing out perceived flaws and strategically posting during peak times to attract maximum attention.
Another important work is that of identity and gender performance, shedding light on cultural prescriptions for self-presentation, which remain equally robust online as they do offline. Physical appearance, emotional expression, and lifestyle must be carefully surveilled and curated differently across contexts, yet it is important for a unifying thread of authenticity to remain intact. Under the constant surveillance of multiple imagined audiences, some were able to maintain the appearance of a seemingly “natural” aesthetic despite the tremendous effort required to produce content so that the “look” of their posts was eye-catching.
Beauty work describes the imperative to post your most attractive self and the production process required to achieve such perfection, including the work of micro-targeting each body part to discover and then conceal one’s flaws. In this process, social media practices are shaped by viewer expectations and site-specific conventions, as they converge with an online social milieu that values maximum visibility, adherence to cultural and gendered beauty norms, and promotion of the self as a recognizable brand image.
Students engaged in the emotional work of anticipating audience desires and developing tailored content across sites designed to get as many likes and positive comments as possible, vigilantly monitoring feedback on posts, and the emotional vicissitudes of counting likes and reading comments. Emotional work also included the imperative to always portray a happy, upbeat self and package one’s sad or angry emotions in socially acceptable ways, which differed by site. In this way, students needed to carefully produce and manage their emotional state.
The work of remaining visible by posting regularly was also important. Posting infrequently suggested a lack of social life. Students worried that if they did not post frequently friends would forget them. Being online constantly and seeing other people’s posts of how they were living their best life often resulted in frustration and jealousy, especially when comparing your own life to that of people in your friend network who seemed to “have it all.”
Finally, the work of managing social relationships involved scrolling through sites and liking others’ posts. Students said it was especially important to like the posts of friends who regularly liked their posts. It was common for a student to call out their closest friends for failing to reciprocate in this way. The timing of a like was important as well. Being the first to like a post signaled a sense of desperation; conversely, students said it was strange to get a like on an old post, explaining that it could signal a sudden and intense focus on them. Through the lens of these various works, we can see how the creation and maintenance of digital multiples becomes infinitely more complex and labor intensive.
The title of our ethnography, A Filtered Life, is multi-layered in meaning. On the most obvious level, it refers to the use of filters available on many platforms to alter and enhance one’s physical appearance and the background of an image. Beyond this interpretation, filters are a metaphor for strategically repackaging the self on different sites. Filtering the self is about every aspect of self-presentation, from the aesthetic of a person’s feed and their physical appearance to the personality characteristics and lifestyle they want to convey. Yet, all of this is bounded by a generational desire to remain authentic, meaning that there are limits to strategic self-expression online. Collette, like others in our study, carefully walked the fine line of achieving the impossible imperative of maintaining both filtered and authentic digital multiples.
The maintenance of digital multiples across online spaces—each with their own set of rules, editorial mandates, and audience expectations—intensified identity work. Everyone knew images they saw online were heavily cultivated, yet many students worked hard to perfect the ability to mask their editorial efforts in an image that appeared natural and effortless. While this editorial tight rope was stressful to navigate, students took pride in cultivating their skills and enjoyed the positive feedback from others when they got it right.
On the one hand, students expressed cynicism and frustration with social media—they struggled with the seeming inauthenticity of editing and self-presentation imperatives. On the other hand, students enjoyed the creative freedom to play with their identities, from the more superficial elements of fashion and physical appearance to deeper aspects of emotional expression and authentic self-presentation. As we look toward the future, it will be important for research to explore how the production of digital multiples shifts after college as young adults take on different roles and responsibilities.
Boellstorff, Tom. 2016. “For Whom the Ontology Turns: Theorizing the Digital Real.” Current Anthropology 57(4): 387-407.
Goffman, Erving. 1959. The Presentation of Self in Everyday Life. New York: Anchor Books.
Hogan, Bernie. 2010. “The presentation of self in the age of social media: Distinguishing performances and exhibitions online.” Bulletin of Science, Technology & Society 30(6): 377-386.
Madianou, Mirca. 2015. “Polymedia and Ethnography: Understanding the Social in Social Media.” Social Media + Society, (April – June): 1-3.
Madianou, Mirca and Daniel Miller. 2013. “Polymedia: Towards a New Theory of Digital Media in Interpersonal Communication.” International Journal of Cultural Studies 16(2): 169-187.
Miller, Daniel, Elisabetta Costa, Nell Haynes, Tom McDonald, Razvan Nicolescu, Jolynna Sinanan, Juliano Spyer, Shriram Venkatraman, and Xinyuan Wang. 2016. How the World Changed Social Media. Vol. 1. London: UCL Press.
Taylor, Nicole and Mimi Nichter. 2022. A Filtered Life: Social Media on a College Campus. New York: Routledge.
Tolentino, Jia. 2019. Trick Mirror: Reflections on Self-Delusion. New York: Random House.
I missed it—did you? Wednesday, March 22, was National 3D Day (celebrated on the 3rd day of the 3rd full week of the 3rd month—get it?)
But it's not too late to celebrate and enjoy some history of 3D by making a virtual visit to 3-D SPACE, The Center for Stereoscopic Photography, Art, Cinema and Education Museum in Los Angeles. — Read the rest
The Smithsonian’s National Air and Space Museum’s One World Connected gallery now features two artifacts from the Long Now Foundation: a prototype of The Clock of The Long Now’s face and a Rosetta Disk. Together, the two artifacts are placed at the end of the gallery, serving as symbols of the need to consider the long-term future in our decision-making in the present.
One World Connected, which opened in the autumn of 02022 as part of the museum’s renovations, focuses on how the aerospace revolution that began in the mid-twentieth century brought about two notable shifts: “the ease in making connections across vast distances and a new perspective of Earth as humanity’s home.” In an interview with Long Now Ideas, Dr. Teasel Muir-Harmony, the exhibit’s curator, said that the gallery’s goal was to show “how aerospace has transformed our experience of Earth” over the past century, contextualizing the aerospace history showcased in the rest of the museum’s galleries in a broader sociological and technological context.
A key part of that transformation were the first images of the whole Earth from space. The One World Connected gallery features a number of items related to those first photographs taken on the Apollo missions, including two issues of the Whole Earth Catalog. The exhibit showcases how our perspective on seeing the whole Earth from space has shifted over time. In the span of a lifetime, images of the Earth from space have gone from “rare and unfamiliar” to “constant and commonplace.”
[For more on how seeing the Earth from space changed everything, read Ahmed Kabil’s 02018 feature on the 50th anniversary of the Apollo 8 “Earthrise” photo.]
One of Dr. Muir-Harmony’s aims in designing the gallery was impressing upon visitors that “this transformation happened rapidly” and is still in progress, pointing to recent advances in fields like satellite-driven Earth observation, navigation, and communications as continued shifts in our perspective. In Dr. Muir-Harmony’s view, “space technology is infrastructure,” and our efforts in space must be understood in terms of their effects on human well-being.
With that in mind, bringing in a long-term perspective made perfect sense to the exhibit’s curatorial team. The two Long Now artifacts in the collection “encourage visitors to think about the future,” and prompt them to consider “the risks and possibilities of interconnection” over a longer time frame.
Chief among the risks and possibilities identified by Dr. Muir-Harmony is the “exponential growth” of satellites and satellite debris in low-earth orbit — a development over the past decade or so that has enabled access to satellite-based internet nearly anywhere on Earth, including the furthest reaches of the poles. Yet the ever-growing nexus of satellites above us also raises key questions about national security and personal privacy that remain unanswered. As Dr. Muir-Harmony notes, the gallery’s priority is to get visitors to “step back and think about the long-term perspective [and] how we want to shape the future” in the face of technological advancements.
Enlarge / United Launch Alliance's Vulcan rocket, without its payload, rolls to the launch pad for tests on March 9, 2023. (credit: United Launch Alliance)
The long-awaited debut of a winged space plane will have to wait a little longer. This week NASA updated its internal schedule to show that Sierra Space's Dream Chaser spacecraft will now berth to the International Space Station no earlier than December 17, 2023.
Previously, Sierra Space had been publicly targeting a launch of Dream Chaser in August, on board United Launch Alliance's new Vulcan rocket.
In a statement to Ars, Sierra Space confirmed the delay. "Sierra Space’s plan is to complete the first launch of Dream Chaser by the end of the fourth quarter this year," the company said.
A satellite built on a small budget and with off-the-shelf supplies could be a solution to space junk.
A team of students from Brown University sent the satellite—which is powered by 48 Energizer AA batteries and a $20 microprocessor popular with robot hobbyists—into space about 10 months ago, hitching a ride on Elon Musk’s SpaceX rocket.
Now, an analysis of data from Air Force Space Command shows that the satellite successfully operated. It could also have far-ranging impacts on efforts to cut down on the growing problem of space debris, which poses a potential danger to all current and future space vehicles.
According to NASA, there are now more than 27,000 pieces of what it calls orbital debris or space junk being tracked by the Department of Defense’s global Space Surveillance Network. Orbital debris ranges from any human-made object in Earth’s orbit that no longer serves a useful function, like nonfunctional spacecraft, abandoned launch-stage vehicles, mission-related debris, and fragmentation debris. It also includes defunct satellites that remain in orbit sometimes decades after their mission is complete.
That’s a problem, given that most satellites remain in orbit for an average of 25 years or more, says Rick Fleeter, an adjunct associate professor of engineering. So when his students got a once-in-a-lifetime chance to design and build their own satellite to be launched into space, they decided to engineer a potential solution.
The students added a 3D-printed drag sail made from Kapton polyimide film to the bread-loaf-sized cube satellite they built. Upon deployment at about 520 kilometers (323 miles)—well above the orbit of the International Space Station—the sail popped open like an umbrella and is helping to push the satellite back down to Earth sooner, according to initial data. In fact, the satellite is well below the other small devices that deployed with it. In early March, for instance, the satellite was at about 470 kilometers (292 miles) above the Earth while the other objects were still in orbit at about 500 kilometers or more.
“You can see in the tracking data that we’re visibly below everybody else and accelerating away from them,” Fleeter says. “You can see that our satellite is already descending toward reentry, whereas the others are still in a nice circular orbit higher up.”
The data suggest that the student satellite, called SBUDNIC, will be out of orbit within five years versus the estimated 25 to 27 years the students calculated for it without the drag device.
Fleeter and the students believe that their initial analysis of the publicly available tracking data serves as a proof of concept that this type of sail can be part of an effort to reduce the number of space debris in orbit around Earth. They hope similar sails can be added to other same-sized devices or scaled up to larger projects in the future.
“The theory and physics of how this works has been pretty well accepted,” Fleeter says. “What this mission showed was more about how you realize it—how you build a mechanism that does that, and how you do it so it’s lightweight, small, and affordable.”
The project is a result of a collaboration between researchers at Brown’s School of Engineering and the National Research Council of Italy. It is also supported by D-Orbit, AMSAT-Italy, La Sapienza-University of Rome, and the NASA Rhode Island Space Grant. The name of the satellite is a play on Sputnik, the first satellite to orbit the Earth, and is also an acronym for the project participants.
This is the second small satellite designed and built by Brown students that’s been sent into orbit in recent years. The previous satellite, EQUiSat, did 14,000 loops around the Earth before ending its mission and burning up upon re-entering the atmosphere at the end of 2020.
SBUDNIC, however, is believed to be the first of its kind that was sent into orbit made almost exclusively from materials not designed for use in space and at such an astronomically low-cost when compared to other objects in orbit. The total cost of the student-designed cube satellite was about $10,000.
“The large complex space missions we hear about in the news are amazing and inspiring, but they also send a message that space is only for those types of specialized initiatives,” Fleeter says. “Here, we’re opening up that possibility to more people… We’re not breaking down all the barriers, but you have to start somewhere.”
A group of about 40 students designed and built the satellite in one year. It started in the course Design of Space Systems, which Fleeter taught in Spring 2021. Italian aerospace company D-Orbit approached with an opening for a satellite on the SpaceX Falcon 9 rocket that would launch in one year. Fleeter turned to his students, who had just listened to their first seminars on space systems design, and presented them the opportunity. From there, the race was on.
The students began by conceptualizing and designing the individual subsystems of the satellite, often working with industry advisors who provided feedback and engineering guidance on the feasibility of their proposals. Students then put their plans into action, managing the technical aspects of the satellite along with coordinating the administrative pieces. The continual prototyping, testing, and improving required amounted to a herculean effort from students in terms of hours and brain power.
Students purchased materials they needed at local stores and online retail websites. They often had to engineer nifty workarounds to their materials so they could survive in space. The approach often meant coming up with test apparatuses that replicated specific environmental conditions of space, like the high vibration from the rocket launch, says Marco Cross, who graduated last year with a master’s degree in biomedical engineering and served as chief engineer for SBUDNIC.
For instance, the team used reptile heating lamps in a vacuum chamber to test the thermal shield they created to protect the satellite’s electronics from the sun.
To be cleared for launch, the satellite had to pass qualification tests and meet strict rules and regulations that SpaceX and NASA follow. “It is a zero-failure-tolerated environment,” Cross says. “The team never wavered.”
The students got the green light after a series of vacuum, thermal, and vibration tests. A group then traveled to Cape Canaveral in Florida to deliver SBUDNIC so it could be inserted into D-Orbit’s larger carrier satellite, which was then put onto the SpaceX rocket.
Along with presenting their findings at conferences and submitting their data to a publication, the SBUDNIC team is currently planning a series of presentations in schools throughout Rhode Island. They hope to inspire future innovators and make high school students more aware of the opportunities that exist for them in space engineering and design.
Source: Brown University
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