Planet could be a gas giant, orbiting 1 to 2 times the distance between Sun and Earth. The Alpha Centauri system, our nearest stellar neighbor, has long captured the imagination of science fiction and ...

Following the death of Ohio-born astronaut Jim Lovell, here's a look at the many other Buckeye State space travelers and their journeys beyond Earth.

Nasa has unveiled remarkable new photographs from the Hubble Space Telescope showing an extraordinary celestial visitor ...