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News
Icy Exocomets Around a Distant Star Help Explain Earth's Water
4+ day, 9+ hour ago (766+ words) Earth's surface water puts the planet into its own, privileged category among the Solar System's bodies. Nowhere else is it found, and this water allowed life to appear and fluorish. Nobody argues that, but what's still up for debate is…...
Scientists call them “belatedly habitable planets”: worlds that enter their star’s habitable zone only after formation. Around M dwarfs, some may first endure hundreds of millions of years of intense radiation that splits atmospheric water and drives its hydrogen into space, leaving them dry before temperate conditions finally arrive.
1+ week, 2+ day ago (1320+ words) A planet can enter the habitable zone only after its young red dwarf has faded, but the same early radiation may already have stripped away the water needed to benefit from milder conditions....
Scientists Found an Amazing Reason Some Lava Worlds Can Keep Their Atmospheres Against All Odds
1+ week, 4+ day ago (655+ words) The hottest rocky worlds may survive by hiding their air in oceans of magma. Worlds like 55 Cancri e seem almost designed to destroy an atmosphere. The rocky super-Earth orbits so close to its star that its year lasts less than…...
Atmospheres of the Solar System
1+ week, 5+ day ago (237+ words) "Atmospheres of the Solar System," explores the vast diversity of planetary atmospheres across our planetary nieghbourhood. This talk on "Atmospheres of the Solar System" explores the diverse layers of gas […] As a service to our community, Sky & Telescope lists astronomy-related…...
How Do Astronomers Detect Exoplanet Atmospheres?
2+ week, 20+ hour ago (583+ words) The signal is extraordinarily small. The star may be thousands or millions of times brighter than the planet, and the atmosphere is only a narrow rim around a moving world. Astronomers observe repeated transits, calibrate the telescope and compare the…...
Mystery of Theory-Defying Planet Atmospheres
2+ week, 4+ day ago (405+ words) Stanford researchers have offered a compelling explanation for why some sizzling, lava-covered worlds nestled tightly around their stars can keep hold of their atmospheres. At such close quarters, intense stellar radiation should strip away a planet's air. Based on modeling…...
This Planet Is 23 Times Heavier Than Earth – and Somehow Still Solid Rock
2+ week, 4+ day ago (384+ words) University of Wisconsin–Madison researchers used TESS, WIYN, and JWST to confirm GJ 523b defies gas-giant formation thresholds The core numbers paint a picture that current formation models struggle to explain. Straight from the preprint submitted to The Astronomical Journal: In…...
Scientists discover massive 'mega-Earth"
3+ week, 2+ day ago (232+ words) (NewsNation) — University of Wisconsin-Madison researchers have identified a unique planet outside our solar system known as a “Mega-Earth,” challenging traditional notions of how planets form. The exoplanet, dubbed “GJ 523b,” is 170 million years old and weighs more than 23 times Earth’s mass…...
Scientists found a ‘Mega-Earth’ 2.5 times the size of Earth with a core 23 times its mass; but it didn’t develop the massive atmosphere expected of a planet this large, and researchers are trying to find out why
3+ week, 2+ day ago (641+ words) Scientists found a ‘Mega-Earth’ 2.5 times the size of Earth with a core 23 times its mass; but it didn’t d The Economic Times...
Super-Earths might be solid deep on the inside
3+ week, 3+ day ago (369+ words) Super-Earths are rocky exoplanets that are larger and more massive than Earth, but smaller than Neptune. Powerful telescopes have provided clues about what their atmospheres are like. But what are they like on the inside? Some astronomers have suggested these…...