A NASA astronaut recently sent the internet into a frenzy when he posted an alien-looking photo on social media. The photo ...

A retired 'UFO general' and a NASA-linked scientist have both vanished in the US, fuelling clashes over whether the case ...

A strange purple object aboard the ISS sparked alien fears online, but NASA revealed it was a potato experiment. It shows how ...

A bizarre floating growth on the International Space Station has caused hilarious online comments.

Add Yahoo as a preferred source to see more of our stories on Google. A composite view of Mars taken by the Viking I and II probes. NASA/USGS In September, NASA announced the discovery of a possible ...

Did NASA discover city lights on an alien planet? This video explores the implications and details of the findings that ...

A photograph taken by a NASA astronaut has sparked fears it shows an extraterrestrial creature, but it’s just a photo of a potato.

Astronomers have discovered an additional 100 new worlds in data collected by NASA's exoplanet-hunting spacecraft TESS, ...

A former NASA developer has analyzed 1950 photographic plates showing nine unexplained objects in Earth's orbit, years before ...

The internet did a double-take after NASA Astronaut Don Pettit shared a photo from the International Space Station that looked, at first glance, like something from a sci-fi movie. The purple, ...

Forty years ago, on January 28, 1986, the nation gathered to watch the Space Shuttle Challenger launch, a historic mission carrying the first "teacher in space," Christa McAuliffe. But 73 seconds into ...