The new video shows the Starship upper stage's return to Earth.

"This is the most exciting and fascinating discovery in substellar astrophysics in decades," an astrophysicist said.

A newly discovered star could challenge some models of how stars evolve and the way they produce elements as they age.

A man captured time-lapse footage of a rare comet which won't be seen on earth for another 80,000 years. Comet Tsuchinshan-ATLAS was spotted by photographer, Rick Clark, 71, on October 13, in Lincoln, ...

W.M. Keck Observatory imagery of star system HR 8799 have been time-lapsed. The system hosts four planets that are more ...