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Revealing hidden alien oceans, with chemistry
NASA scientists say that to find hidden alien oceans on distant exoplanets, use chemistry. Ocean worlds will have distinctly different atmospheric compositions from planets that don't have oceans, including a lack of ammonia.
November 5, 2021
Exoplanet lost its atmosphere in ancient impact
A young Earth-sized exoplanet lost its atmosphere in a giant impact about 200,000 years ago, leaving behind clues in leftover dust and carbon monoxide gas.
November 4, 2021
Probing the depths of Jupiter’s storms
Juno provided data that has let scientists probe the depths of Jupiter's storms. We now know the Great Red Spot extends some 200 miles (300 km) down.
November 2, 2021
Another Astra launch attempt is imminent
A test payload for the U.S. Space Force to launch from the Astra spaceport in Alaska in early November 2021 will be Astra's 4th attempt at reaching orbit.
October 28, 2021
A new field guide for hot Jupiters
A new field guide for hot Jupiters combines Hubble Space Telescope observations with theoretical models. It should inform ideas about planet formation.
October 28, 2021
The 1st extragalactic planet?
Scientists believe they might have detected the 1st extragalactic planet by examining x-rays from M51, the famous Whirlpool Galaxy.
October 27, 2021
Asteroid Bennu’s boulder mystery solved
Asteroid Bennu's boulder mystery has now been solved, scientists say. Highly porous rocks explain the abundant large rocks but lack of fine sand-like regolith.
October 27, 2021
Andromeda galaxy photos, 2021
Enjoy a photo gallery of the best Andromeda Galaxy images from EarthSky readers! The Andromeda Galaxy is a great observing target on fall evenings.
October 27, 2021
Heads up! Famous comet 67P/C-G nearly closest
Famous comet 67P/C-G will sweep closest to Earth in November. Finder charts help you locate this comet before it leaves for another 193 years.
October 26, 2021
Watch the Progress 79 cargo launch October 27
On October 27, 2021, Russia’s uncrewed Progress 79 cargo craft will launch from the Baikonur Cosmodrome in Kazakhstan. Here’s how to watch.
October 26, 2021
