An American astronaut and two Russian cosmonauts arrived at the International Space Station early Thursday, kicking off a four-month stay aboard the orbiting laboratory.

Science editor Alan Boyle's blog: Astronomers are taking a long, deep look at one of the best-known galaxies beyond our own Milky Way, to learn more about what happened when it gobbled up another agglomeration of stars that got too close.

A small, faint asteroid will be coming into view this week, and lucky skywatchers with the right tools could catch a glimpse of the space rock.

Students' science experiments are about to make history, launching to space on the first attempt by a U.S. commercial company to send a spacecraft to the International Space Station.

Stars like our sun can release "superflares," explosions of up to 10,000 times more energy than the solar flares seen from our sun, researchers say.