Wondering what 3I ATLAS is all about? Here's what to know as interstellar comet 3I/ATLAS nears Earth this week, when to watch ...

When NASA scientists opened the sample return canister from the OSIRIS-REx asteroid sample mission in late 2023, they found ...

Normal matter – which makes up everything we see and touch – isn’t the only type of matter present in the universe.

Comet 3I/ATLAS will get closest to Earth on Dec. 19, and astronomers will be watching.

A vast ring of rocky leftovers between Mars and Jupiter, the asteroid belt preserves clues to how the planets — and Earth ...