Space

The moon was once engulfed by a massive magma ocean, analysis of geological samples collected by India's Chandrayaan-3 mission suggests.

A tiny fraction of known black holes emit X-ray signals that resemble a human "heartbeat." Now, new research may finally explain the strange phenomenon.

Overnight on Aug. 20-21, the full 'Sturgeon Supermoon' briefly occulted, or passed in front of, Saturn, snuffing the ringed planet's light from the sky. An epic new astrophotography image captures the entire spectacle from start to finish.

Stars that wander too close to supermassive black holes may be violently undone in a process called "spaghettification." New simulations provide the most detailed look ever at the gory interaction.

Astronomers have pinned down a faraway black hole's snack schedule after watching it devour a star across years.

Last year, Earth spewed charged particles into the sun in a rare cosmic event that has surprised scientists.

Here's everything you need to know to see the moon as it occults, or passes completely in front of, the bright planet Saturn tonight.

A new study helps solve the "final parsec problem" that has made supermassive black hole formation impossible to explain, pointing to a strange form of dark matter as the key.

A 'once in a blue moon' event might not be as infrequent as you think.

On Aug. 8, NASA scientists may have spotted a record number of sunspots when hundreds of individual spots were estimated to occur within 24 hours.