When NASA's DART spacecraft slammed into the asteroid moon Dimorphos in September 2022, it didn't just change the asteroid's ...

Clock time is also getting shorter, kind of. Broadly speaking, Earth takes roughly 24 hours to spin around on its axis. Ocean ...

The Earth and moon are within view of NASA's Artemis 1 Orion spacecraft. The Earth is over 260,000 miles away (418,000 km) in ...