Today in pretty space pics: Comet Lovejoy, still alive and heading back out toward the far reaches of the solar ...

Two more little Earth-sized planets have been discovered orbiting a distant star, astronomers said Wednesday, and ...

Two small, scorched Earth-sized worlds orbiting a reddish sun-like star in the Cygnus constellation mark yet another ...

When space agencies or institutions want to erect a space telescope, they usually look to some remote area like ...

More than three decades after launching from Earth, Voyager 1 is about to leave the solar system. The probe, which ...

When it comes to planetary formation, water is often one of the trickiest questions scientists find themselves ...