The moon is about to get walloped by a big piece of space junk...

Scientists have concluded that a meteorite from Mars contains no evidence of ancient Martian life...

The world's largest and most powerful space telescope has blasted off on a high-stakes quest to behold light from the first stars and galaxies...

Jurors in the fraud trial of former Theranos CEO Elizabeth Holmes returned to the courtroom Thursday to listen to a replay of audio recordings that captured her brash promises about a vaunted blood-te...

The $10 billion successor to the Hubble Space Telescope is about to take flight...

Chinese astronauts are beaming back a science lesson from the country's under-construction space station...