If life exists on moons orbiting Saturn and Jupiter, instruments headed there in the fall may just need a tiny ice grain to find it.

A new study offers important insights into the evolution of the moon's interior, and potentially for planets such as the Earth or Mars.

The new discovery "points to some not-yet-understood process that is responsible for the granitic formation."

Scientists found phosphates in Enceladus' ocean at levels at least 100 times higher—and perhaps a thousand times higher—than what is in Earth's oceans.

Quakes could be the source of the mysteriously smooth terrain on the moons circling Jupiter and Saturn, according to a new study.

A frozen mix of water and table salt created in a lab on Earth could explain the red streaks crossing the surface of Jupiter's moon Europa.

"We will build on the moon. We will colonize the moon. We will exploit the moon. We will do science on the moon," according to a new book.

A future mission to Enceladus, one of Saturn's 83 moons, could discover its potential for harboring alien life—all without ever landing.

New information about the surface properties of the moon's permanently shadowed region will help to identify suitable locations for future lunar missions.

Bizarre underwater snow is known to occur on Earth, but a new study shows that the same is likely true for Jupiter's moon, Europa.