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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
See 42 of the largest asteroids in new images
Astronomers with the European Southern Observatory (ESO) have obtained new and more detailed images of 42 of the largest asteroids in the main asteroid belt.
October 24, 2021
Small galaxy consumes an even smaller galaxy
Scientists found evidence that a small galaxy - the Large Magellanic Cloud, a satellite of the Milky Way - has eaten an even smaller galaxy.
October 22, 2021
White dwarf star abruptly switches on and off
Astronomers have witnessed a white dwarf switching on and off - or going from a bright to dim stage and back - over a period of just 30 minutes.
October 22, 2021
