GS-z13-1, marks the earliest sign yet spotted of the era of cosmic reionization at 330 million years after the Big Bang.

Cue the "Star Wars" theme and the opening crawl: "A long time ago in a galaxy far, far away ..." That's what noncontroversial ...

Two space missions reached their conclusion: one with a splashdown, the other with a quiet lunar death. And thrilling new ...

"It's time we all realize that we are crew members on this spaceship called Earth and start to think about our role and ...

NASA astronauts Butch Wilmore and Suni Williams returned to Earth after nine months stranded in space and were greeted by a ...