Planetary science and exploration

Prof. Dava Newman, director of the MIT Media Lab and former NASA deputy director, speaks with Blake Burman of NewsNation’s The Hill about how long-duration stays in space can affect the human body and how NASA astronauts Suni Williams and Butch Wilmore will reacclimate to Earth’s gravity. “Gravity is something! When you haven’t been in gravity” for nine months, Newman explains, “it’s going to take a week or two, it takes a month until you really get your motor control back. So just slow adaptation now.” 

Ariel Ekblaw SM ’17, PhD ’20, founder of the MIT Space Exploration Initiative, joins WCVB-TV to discuss the successful return of NASA astronauts Suni Williams and Butch Wilmore, and the impact of nine months in space on the human body. "When you're living in a long-duration microgravity mission, you do lose some of your muscle mass,” Ekblaw explains. “Your heart weakens because it's not having to pump your blood against the force of gravity. And even funny things like your eyesight can change because the shape of your eyeball is a little different in microgravity.”

Researchers at MIT have discovered how “greenhouse gases are impacting Earth’s upper atmosphere and, in turn, the objects orbiting within it,” reports Grace Snelling for Fast Company. “If we don’t take action to be more responsible for operating our satellites, the impact is that there are going to be entire regions of low Earth orbit that could become uninhabitable for a satellite,” says graduate student William Parker.

MIT researchers have discovered that increased greenhouse gas emissions in the Earth’s upper atmosphere can “potentially cause catastrophic satellite collision in low-Earth orbit,” reports Bruce Dorminey for Forbes. “When the thermosphere contracts, the decreasing density reduces atmospheric drag — a force that pulls old satellites and other debris down to altitudes where they will encounter air molecules and burn up,” Dorminey explains. “Less drag therefore means extended lifetimes for space junk, which will litter sought-after regions for decades and increase the potential for collisions in orbit.”  

MIT researchers have found that high levels of greenhouse gas emissions in the atmosphere may increase the risk of satellite collisions, reports Sachi Kitajima Mulkey for Grist. “The environment is very cluttered already. Satellites are constantly dodging right and left,” says graduate student William Parker. “As long as we are emitting greenhouse gases, we are increasing the probability that we see more collision events between objects in space.” 

Associated Press reporter Seth Borenstein writes that MIT scientists have found that climate change could “reduce the available space for satellites in low Earth orbit by anywhere from one-third to 82% by the end of the century, depending on how much carbon pollution is spewed.” Graduate student William Parker explains: “We rely on the atmosphere to clean up our debris. There’s no other way to remove debris. It’s trash. It’s garbage. And there are millions of pieces of it.”

A new study by MIT researchers finds that “climate change could threaten the future use of satellites and significantly reduce the number of spacecraft that can safety orbit Earth,” reports Julia Jacobo for ABC News. The researchers found “global warming is causing space debris to linger above the planet for longer periods of time, leaving less space for functioning satellites and posing a growing problem for the long-term use of Earth’s orbital space,” Jacobo explains. “Reducing greenhouse gas emissions doesn't just help us on Earth, it also has the potential to protect us from long-term sustainability issues in space,” explains graduate student William Parker. 

A study by MIT scientists has found that increased greenhouse gas emissions will shrink the Earth’s upper atmosphere causing a “drop in the satellite-carrying capacity of low Earth orbit,” repots Passant Rabie for Gizmodo. “Without an atmosphere, most space debris would remain in orbit indefinitely,” Parker said. “As the atmosphere thins, debris lingers longer, increasing the risk to active satellites. With the growing consequences of space debris, we can accommodate fewer debris-generating events.”

Researchers at MIT have found that climate change could raise the risk of satellite collisions, reports Justine Calma for The Verge. “We’ve really reached the end of that era of ‘space is big,’ and I think we should stop saying that,” says graduate student, William Parker. “People don’t realize that the space sustainability issue is really an issue that impacts them directly.”

Ariel Ekblaw, principal investigator for the “To the Moon to Stay” mission and a visiting scientist at the MIT Media Lab, speaks with Chaiel Schaffel of WBZ News Radio about the three payloads MIT engineers built for a recent mission to the moon. Of the AstroAnt rover that Ekblaw and her team developed for spacecraft assembly and external servicing, she explains: "What we want to do in the future is send hundreds or thousands that will crawl on the outside of space stations, maybe crawl on the outside of a lunar habitat, and do the inspections that would be really risky for humans to do."

Researchers at MIT have sent three payloads into space, including the AstroAnt, a small robotic device developed to help monitor spaceship conditions, reports Kenneth Chang for The New York Times. The AstroAnt rover is about the size of a “Hot Wheels” toy car and can measure a lunar rover’s temperature and communicate via a wireless Bluetooth connection. “MIT researchers envision that swarms of AstroAnts could be used to perform various tasks in space,” Chang explains. 

Orlando Sentinel reporter Richard Tribou spotlights the AstroAnt, a small robotic device developed by MIT researchers to monitor spaceship conditions during lunar missions. The device can wheel around the roof of a lunar rover “to take temperature readings and monitor its operation.”  

MIT researchers developed a small robotic rover called the AstroAnt and a depth-mapping camera for use in monitoring spaceship conditions during space missions, reports Richard Luscombe for The Guardian. The AstroAnt is designed to “eventually assist in diagnostic and repair tasks for spacecraft during lunar missions,” explains Luscombe.

Boston Globe reporter Hiawatha Bray spotlights how MIT researchers developed a thumb-sized rover and a depth-mapping camera, technologies that will be used on a mission to the south pole of the Moon. The mini rover, dubbed AstroAnt, could one day be used to “patrol the exteriors of lunar probes, satellites, or space stations. Some might use cameras to spot meteorite damage, while others could apply sealants to prevent air or fuel leaks.”

Prof. Richard Binzel speaks with The Naked Scientists host Chris Smith about near-earth objects (NEOs). “It’s the appearance that will distinguish what we call an asteroid and what we call a comet,” explains Binzel. “If it looks like a tiny little star, or star-like, it's an asteroid. But if it's fuzzy, we call it a comet. But generally speaking, they have two different origins. Asteroids tend to come in from the asteroid belt, which is between Mars and Jupiter. And comets tend to come from way out in the far reaches of our Solar System.”