Galileo Galilei, with a homemade telescope, noticed three points of light near Jupiter. Initially believing they were distant ...

During January 2025, a large planetary conjunction involving four planets — Venus, Saturn, Jupiter and Mars — will be visible with the naked eye, according to NASA. Here’s what to know about the ...

Collaborative work by amateur and professional astronomers has helped to resolve a long-standing misunderstanding about the composition of Jupiter's clouds. Instead of being formed of ammonia ice -- ...

With a rare black moon and the peak of the year's first major meteor shower already behind us, January is shaping up to be an ...

Pluto may have got romantic to capture its largest moon, colliding and engaging in a passionate but icy 10 hour kiss with Charon billions of years ago.