The bright stars Castor and Pollux will be positioned to the left of the moon in the early morning hours of Aug. 19. Mercury, ...

The waning Moon passes Jupiter, Venus, and Mercury before dawn, while Titan’s shadow transits Saturn in the sky this week.

This quiz will challenge your knowledge of Jupiter's features, moons, and the missions that have dared to get close.

We already know a decent amount about how planets form, but moon formation is another process entirely, and one we're not as ...

Jupiter’s newly discovered moons have yet to be named. Sheppard said only half of them are big enough — at least 1 mile (1.5 kilometers) or so — to warrant a name.

Jupiter’s moons have long fascinated scientists with their potential to harbor life, challenging our understanding of ...

Often overshadowed by Europa and Ganymede, Callisto is actually one of the largest moons in our solar system. In this video, ...

A NASA spacecraft made its closest-ever approach to Jupiter's moon Io, coming within 930 miles of the "surface of the most volcanic world," and the space agency released new images of the flyby.

And now, 12 new moons of Jupiter including the weirdest one yet. Scott Sheppard: “We believe these objects were probably captured by Jupiter a long time ago and they are grouped in their orbits.” ...

That brings the total number of moons around the gas giant to 79. Eleven of the new moons join existing groups of Jovian satellites, but one of Jupiter's new moons follows a unique, odd path.