The King of the Planets teams up with an exceedingly narrow crescent moon for the last time this year in the evening sky on May 27.

Recent flybys of the fiery world refute a leading theory of its inner structure—and reveal how little is understood about ...

ESA's Mars Express orbiter captured footage of the Mars' moon Deimos pass in front of Ganymede, Europa, Jupiter, Io and ...

Each of Jupiter's other 91 official moons has a diameter greater than 0.6 mile (1 kilometer) — but only 57 have names, and just eight have regular, nearly round orbits.

Head’s up, skywatchers: Wednesday, June 25, is the new moon in Cancer, and according to astrologers, this month’s new phase ...

The icy surface of Jupiter 's moon Europa appears to be constantly changing, new data from the James Webb Space Telescope has revealed. This phenomena, the team explained, is heightened in so-called ...

Jupiter is a huge planet with a ridiculous number of moons. And now, thanks to new research, that number just became even more ridiculous. Scientists have discovered 10 never-before-seen moons of ...

A new study proposes that seeding the orb’s underground ocean with microbes might help us learn how to make other worlds habitable ...