Astronomers using the NASA/ESA/CSA James Webb Space Telescope have for the first time identified hydrogen sulfide gas in the atmospheres of three gas-giant exoplanets orbiting HR 8799, a ...

The Chandra team has released a striking new composite image of the Cocoon Nebula, a reflection and emission nebula in the constellation of Cygnus.

ESA’s CHaracterising ExOPlanet Satellite (CHEOPS) has revealed a four-planet system whose outermost world is a small and ...

Using archival data from NASA’s NEOWISE mission along with data from other space and ground-based observatories, astronomers identified the clearest observational record yet of a massive star fading ...

A new analysis of data from four instruments aboard NASA’s Cassini spacecraft has demonstrated the crucial role that Saturn’s ...

For decades, the motions of stars near the center of our Milky Way Galaxy have been treated as some of the clearest evidence ...

Known non-biological sources, from meteorites to surface chemistry, fall short of accounting for organic compounds detected ...

Planetary scientists have identified a previously unrecognized pathway for water loss on Mars -- observed, for the first time ...

Using high-precision radio-occultation measurements from NASA’s Juno mission and incorporating the effects of zonal winds, ...

Astronomers using the Event Horizon Telescope -- a planet-scale array of eight ground-based radio telescopes -- have ...