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

High above the Moon, the Big Dipper appears to stand on the end of its bowl in the early evening, its handle sticking straight up into the sky. Jupiter’s Galilean moons are also visible this ...

Earth’s companion has allowed astronomers to define lunar cycles, navigate without technology, and understand celestial ...

A recent study found that Jupiter was once twice the size that it is now, making it big enough to swallow up 2,000 Earths.

At last count, Jupiter has 95 moons, but the four main ones — Ganymede, Callisto, Io and Europa — were discovered in 1610 by famed Italian astronomer Galileo Galilei. But their names came from ...

What landing sites on Jupiter’s moon, Europa, would be the most ideal for searching for life on the small moon? This is what a recent study published | Space ...

Stunning new Jupiter photos from NASA’s Juno spacecraft reveal storms, cloud bands, and its volcanic moon Io as the mission nears its final orbits around the gas giant.

Have a telescope? You might also get your last look at three of Jupiter's bright Galilean moons before solar conjunction. This is the view around 9 p.m. Central Time May 27. North is to the upper ...