North America’s celestial highlights for the weekend ahead, which also apply to mid-northern latitudes in the northern ...

The predawn hours of Aug. 8 present a perfect opportunity to see Jupiter's four largest moons line up next to the "King of the Planets" as it voyages through the stars of the constellation Gemini.

NASA's Juno spacecraft captured a photo of Jupiter's moon Thebe.

Ganymede, Jupiter's largest moon, is also the solar system's largest satellite, even larger than the planet Mercury. It is ...

Another day, another show in the sky! If you look up after dark on Wednesday, April 22, you’ll catch a charming moment in the cosmos, no telescope required: a glowing waxing crescent moon hanging near ...

If you’re in the mood for a little late-night magic, you’re in luck! Just after midnight, the moon — now passing its last quarter phase — will light up the east-northeastern horizon, cozying up right ...

A comet from another star system will swing by Mars on Friday as a fleet of spacecraft trains its sights on the interstellar visitor. We already know a decent amount about how planets form, but moon ...