NASA's long-lived rover Opportunity has returned an image of the Martian surface that is puzzling researchers.
NASA's long-lived rover Opportunity has returned an image of the Martian surface that is puzzling researchers.
NASA-funded astronomers have, for the first time, spotted planets orbiting sun-like stars in a crowded cluster of stars.
NASA's Mars Curiosity team has almost finished robotic arm tests in preparation for the rover to touch and examine its first Martian rock.