Nola Taylor Tillman

Scientists have long thought the Earth's moon was vital for its habitability. But that may not be so.

Saturn's rings may not be unique to our solar system.

Geysers exploding from the surface of Saturn's moon, Enceladus, reveal their source is an underground ocean.

A pair of satellites built to study the sun has discovered 122 new sets of twin stars, known as eclipsing binaries.

Future missions to the Saturn moon Titan may look for lightning in a novel way — by searching for its rumbling companion, thunder.

The latest and best-ever map of our planet's gravitational field.

The first stars formed in groups, not in isolation, a new study finds.