Comet Lemmon, officially designated C/2012 F6 (Lemmon), is a long-period comet discovered in 2012 by the Mount Lemmon Survey ...

"Comets Lemmon and SWAN soar millions of miles away from Earth, beaming with auroras and airglow, in these celestial images ...

It's a long trip to the red planet and space is tight, but eating well could require just a few simple ingredients.

Three Chinese astronauts are stranded on board the Tiangong space station after their spacecraft was used to return another ...

The Shenzhou-21 crew has been marooned on China's Tiangong space station after three of their colleagues were brought back to ...

The spacecraft in question was the Shenzhou-20 capsule, which transported a crew of three astronauts to the Tiangong space ...

Wrapping up 204 days in orbit, three Chinese astronauts flew back to Earth aboard a Shenzhou spacecraft Friday, leaving three ...

Three Chinese astronauts have returned to Earth after they were briefly stranded at the nation's space station when space ...

China's Shenzhou-21 crew of astronauts is technically currently stranded on board the Tiangong without a usable spacecraft at ...

Three astronauts returned to Earth on Friday after being stranded due to a rare space debris incident. The Chinese crew was ...

Out of an "abundance of caution," the station's three Russian cosmonauts were instructed to spend a night in the ISS ...

The return of the three Shenzhou-20 astronauts was delayed for more than a week after their spacecraft was apparently hit by ...