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Planetary Science & Exoplanets
Worlds near and far—atmospheres, habitability, and planetary formation.
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JWST found brown dwarfs at 2 Jupiter masses and a molecule no model predicted
20+ hour, 4+ min ago (448+ words) Brown dwarfs were supposed to have a floor. The objects that fall between planets and stars — too massive to be planets, too small to sustain the hydrogen fusion that makes a star burn — were thought to require at least a…...
Kamil Crater Meteorite Haul: Google Earth spot rewrites impact models; thousands of iron fragments mapped
20+ hour, 37+ min ago (30+ words) A rayed crater found by an Italian curator What the 2010 expedition measured How much meteorite was found and recovered How the fragments were scattered Why the crater surprised researchers...
People think Earth dies when the Sun becomes a red giant in five billion years — the more likely end is a billion years from now, when a star already 30 percent brighter than at birth pushes CO₂ too low for C3 plants, then a moist greenhouse strips the oceans of hydrogen and leaves a sterile Venus
14+ hour, 25+ min ago (431+ words) The popular ending is fire. The actual ending is a slow loss of air that plants can breathe, then of water that can come back....
Astrophysics study suggests Venus may have swallowed its moon
1+ day, 8+ hour ago (555+ words) A California-based astrophysicist has presented a new theory to explain why Venus, the planet most like Earth in size, mass and structure, lacks its own moon. Call it a case of celestial cannibalism. The extremely slow speed at which Venus…...
Moons That Were Shattered and Rebuilt from Debris May Still Be Hiding Oceans Beneath Their Ice
10+ hour, 55+ min ago (763+ words) Beneath the ice of some of the solar system's most intriguing moons, vast oceans may be hiding, and they may be among our best chances of finding life beyond Earth. But some of these worlds were once torn apart by…...
Where does a planet end and a star begin? Webb found a free-floating brown dwarf only about twice Jupiter’s mass, surrounded by a disk of planet-forming material — an object with a planet’s mass that appears to have formed like a star.
17+ hour ago (1201+ words) Webb spectroscopy identifies a roughly two-Jupiter-mass IC 348 member with infrared excess from a disk, while spatial evidence favors star-like formation over planetary ejection....
The Asteroid That Killed the Dinosaurs Was Stranger Than We Thought
1+ day, 3+ hour ago (87+ words) Scientists are narrowing down the type of space rock that caused the mass extinction at the end of the Cretaceous period, and new research suggests it was no ordinary rock....
Scientists Rewrite the Atomic Structure of Glass While It Melts
1+ day, 7+ hour ago (159+ words) Researchers can now rewrite glass chemistry while it is still molten, unlocking properties that extreme heat once made impossible....
New details about a major solar storm rewrite space weather history
1+ day, 15+ hour ago (935+ words) A 175-year-old mistake about a major solar storm has been uncovered, changing the timeline of space weather’s earliest impacts on technology. A train getting ready to leave a station in southwest England once sat idling. Its telegraph signal had gone…...