Exoplanets

Researchers at MIT and elsewhere have found “the smallest asteroids ever detected within the main belt, which is a field between Mars and Jupiter where millions of asteroids orbit,” reports Sabrina Lam for The Boston Globe. “With new technology, we can find populations of asteroids that were inaccessible previously,” says Prof. Julien De Wit.  “Now we have the capability to be able to study this object further out, predict the orbit with much better accuracy, and decide what to do for potential or possible future impactors.”

Using the James Webb Space Telescope (JWST), MIT astronomers have spotted “small space rocks – including some just dozens of feet in length, the tiniest ever discovered in our solar system’s main asteroid belt between Mars and Jupiter,” reports Robin George Andrews for National Geographic. “This work helps to fill in astronomers’ understanding of the asteroid belt, the wreckage left behind from the inner solar system’s formation—and it’s always nice to spy more of those rocky time capsules for future study,” explains Andrews. 

MIT scientists have discovered the smallest asteroids known to exist in the Main Asteroid Belt between Mars and Jupiter, reports Alfredo Carpineti for IFL Science. “The team of researchers behind this new discovery cleverly reused images from the search for exoplanets,” writes Carpineti. “Stacks of images looking at the same distant star field were used with a technique called “shift and stack”, which aims to highlight possible movement in the foreground, like from an asteroid. They were able to find 138 asteroids in the decameter size range.”

Researchers at MIT and elsewhere have discovered an exoplanet that “is 50% larger than Jupiter and as fluffy as cotton candy,” reports Aylin Woodward for The Wall Street Journal. “Basically, for over 15 years now, the astronomy community has been puzzled by a category of gas giants that are bigger than what they should be given their mass,” explains Prof. Julien de Wit. 

CNN’s Ashley Strickland reports on the discovery of an exoplanet on the path to becoming a “hot Jupiter,” providing clues about the evolution of these massive Jupiter-like planets closely orbiting their host stars. As Prof. Sarah Millholland explains: “This system highlights how incredibly diverse exoplanets can be. They are mysterious other worlds that can have wild orbits that tell a story of how they got that way and where they’re going.”

Applying models that simulate erosion on Earth to Saturn’s largest moon, MIT scientists have determined that waves of methane and ethane on Titan likely shaped the moon’s coastlines, writes Elisha Sauers for Mashable. “If Titan's oceans exhibit waves, that could give scientists insight into the moon's climate,” Sauers writes. “They could then begin predicting the strength of wind on this world and infer what direction it's often blowing — factors that might be necessary to power such waves.”

NBC Boston reporter Matt Fortin visits the lab of Prof. Julien de Wit to learn more about his work discovering two new planets, a puffy, Jupiter-sized planet located over 1,000 light years away that has the consistency of cotton candy and an Earth-sized planet that may lack an atmosphere. “Through studying other atmospheres we get to improve our understanding of our own climate,” de Wit explains. “It’s like a sensitive mirror that helps us reflect back on us, so it’s all these different vantage points that we are gaining. That’s what exoplanetary science gives us.”

MIT astronomers have discovered an exoplanet that is 50% bigger than Jupiter, but still the second lightest planet ever found, with a density similar to cotton candy,” reports Leah Asmelash for CNN. The planet could provide a useful window into how puffy planets form. “The bigger a planet’s atmosphere, the more light can go through,” Prof. Julien de Wit explains. “So it’s clear that this planet is one of the best targets we have for studying atmospheric effects. It will be a Rosetta Stone to try and resolve the mystery of puffy Jupiters.”

Researchers from MIT and elsewhere have discovered a celestial body, which has been called “the second lightest planet ever discovered,” reports Eric Lagatta for USA Today. “The star-orbiting exoplanet outside of our solar system is about seven times less massive than Jupiter, which is why astronomers compare its low density to cotton candy,” Lagatta explains. 

Researchers at MIT and elsewhere have uncovered a new “earth-sized planet orbiting a small, cool star that is expected to shine for 100 times longer than the sun,” reports Ian Sample for The Guardian. The planet is “55 light years from Earth and was detected as it passed in front of its host star, an ultra-cool red dwarf that is half as hot as the sun and 100 times less luminous,” writes Sample. 

MIT astronomers have discovered an exoplanet with a density similar to cotton candy, reports Newsweek’s Jess Thomson. The planet, “named WASP-193b, is the second-least dense exoplanet ever found, with a density of around 0.059 grams per cubic centimeter, or 3.68 pounds per cubic foot,” Thomson explains. “This makes it about 7 times less dense than our neighboring planet Jupiter, despite being 50 percent larger in size, and about 1 percent the density of our own planet.”

An international team of astronomers, including scientists from MIT, discovered an exoplanet with an “exceedingly low density for its size,” reports Marcia Dunn for the Associated Press. The planet “is ideal for studying unconventional planetary formation and evolution,” explains Dunn. 

Forbes contributor Jamie Carter spotlights a new study co-authored by MIT scientists that suggests, “the absence of carbon dioxide in a rocky planet’s atmosphere—relative to others in the same star system—may indicate the presence of liquid water on the planet’s surface.”

Prof. Sara Seager and her colleagues have discovered “a six-pack of planets, formed at least 4 billion years ago,” that orbit a nearby sun-like star named HD110067, reports Joel Achenbach for The Washington Post. “Occasionally, nature reveals an absolute gem,” says Seager. “HD 110067 is an immediate astronomical Rosetta stone – offering a key system to help unlock some mysteries of planet formation and evolution.”

A team of astronomers, including researchers from MIT, witnessed a star swallowing up an entire planet for the first time, reports Margaret Osborne for Smithsonian Magazine. “For decades, scientists have only been able to witness the before and after of such planetary engulfment,” writes Osborne.