Spacecraft that could fuel up in orbit would be less weighed down at liftoff and fly deeper into space; making those refills happen is a big challenge ...

Recent discoveries of new moons orbiting Saturn have sparked renewed interest in the processes behind the planet’s ring ...

Today in the history of astronomy, a photo is shot. The moon Phoebe will be discovered in it months later.

New Hubble Space Telescope imagery of the Saturn show it's 'ring spokes' in orbit around the gas giant planet. Credit: ...

Astronomers may have just spotted a giant planet orbiting the star closest to our Sun - and then lost sight of it.Using ...