These three exoplanets are among the least dense ever found, and all attempts to probe their atmospheres have been blocked by a mysterious smog.

Astronomers have used the James Webb Space Telescope to capture the most detailed look yet at the atmosphere of Kepler-51d, a planet so lightweight it has been compared to cotton candy. The new data ...

Jupiter Icy Moons Explorer (JUICE) probe is on its (very long) way to Jupiter, and will finally arrive at the King of Planets in 2031. Its primary mission is to focus on the "big three" icy ...

Winter constellations shine defiantly in the face of spring as galaxy season and zodiacal light beckon.