One billionaire wants to move industry off-world, returning Earth to a pristine state. The other wants to colonise Mars.

April 21 - 28 is International Dark Sky Week, a global celebration of the night sky during which like-minded organizations ...

A reddish star is about to pass through a "beehive" of stars. That "star" is actually one of Earth's planetary neighbors.

A new study released on Thursday describes a search for what are called "microlensing" events, where a planet acts as a ...

These are the kinds of questions astrophysicist and science journalist Adam Becker poses in his new book, More Everything ...

The new moon occurs April 27, and a day later Venus and Saturn will make a close approach to each other (known as a ...

Whether or not we’re alone in the universe is one of the biggest questions in science. A recent study, led by astrophysicist Nikku Madhusudhan at the University of Cambridge, suggests the answer might ...

"Before Hubble, no generation ever had access to unimaginably vibrant views of space, stretching almost all the way back to ...

The HiRise camera is living up to its name, capturing a rare look at the veteran rover from way up in Martian orbit.

New research suggests ancient Mars may have been warm and wet, with rainfall or snowmelt carving its iconic valleys.

Perhaps the best known of all comets is Halley, correctly pronounced so that it rhymes with rally, not daily. It is named after the 17th-18th century astronomer Edmond Halley. This ...

Most meteorites are small — pebble-sized or smaller — chunks of rocky material that, in most cases, get buried in the soil or ...