A famous illustration of Saturn's moon Titan got it all wrong. Never mind -- what we imagine space to be, and what we know it ...

Observations made possible by NASA's Saturn-probing Cassini spacecraft led to the discovery that a vast liquid ocean is teeming beneath the icy exterior of Mimas. "Its heavily cratered surface ...

A composition photo of images taken during the lunar occultation on Jan. 4 captures the progression of the moon moving in ...

A famous illustration of Saturn's moon Titan got it all wrong. Never mind -- what we imagine space to be, and what we know it is, can both evoke the sublime.

There is no surface below. Saturn's made almost entirely of hydrogen and helium gas, which is why it's called a gas giant. 4,000 kilometers above the surface, we hit Saturn's upper atmosphere.

Twenty years ago, the Huygens probe achieved humanity's first landing on a moon in the outer solar system when it touched down on Titan.