When searching for the unknown, classic physics wisdom holds that a bigger detector boosts the chances of discovery. A ...

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

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

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

A new theoretical study proposes a radical idea in the search for dark matter—using the surface of Ganymede, Jupiter’s ...

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

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

Jupiter's moons resemble little moons! Do they orbit in a regular pattern, similar to how the Moon orbits the Earth? Today, ...

One of Jupiter’s 95 known moons, Europa is almost the size of our own moon. It’s encased in an ice sheet estimated to be 10 miles to 15 miles or more (15 kilometers to 24 kilometers) thick.

Jupiter's four largest natural satellites are collectively known as the Galilean moons, in honor of famed astronomer Galileo Galilei, who observed them in 1610.

A dozen new moons have been found orbiting Jupiter, including 11 normal moons and one “oddball” moon, according to Carnegie Institution for Science.

And the only way that makes sense, and fits with preexisting models of the evolution of Jupiter and its inner moons, is that Io has been erupting for perhaps as long as 4.5 billion years.