The spacecraft that has quietly rewritten our understanding of Mars just crossed a very visible milestone: the Mars Reconnaissance Orbiter has captured its 100,000th close-up view of the Red Planet.

All of which has yielded crisp views of many different Martian scenes, including the remnants of gaseous eruptions and impact ...

The 100,000th image captured by NASA's Mars Reconnaissance Orbiter. NASA/JPL-Caltech/University of Arizona NASA’s Mars Reconnaissance Orbiter (MRO) has been flying ...

On Aug. 12, 2005, NASA launched its Mars Reconnaissance Orbiter (MRO) mission. Some of the best cameras ever launched into space are on MRO, and the spacecraft has taken some seriously amazing, photos ...

NASA's sharp-eyed Mars Reconnaissance Orbiter (MRO) just notched a big milestone. MRO's HiRISE ("High Resolution Imaging Science Experiment") camera has now snapped 100,000 photos of the surface of ...

NASA lost communication with its MAVEN probe nearly a month ago, and efforts to re-establish a connection have been futile.

Mars once had sprawling river systems that rivaled major watersheds on Earth, and scientists have now identified the biggest ...

LONDON -- It turns out the Beagle has landed after all -- but it never called home. The spacecraft Beagle-2 went missing on Christmas Day 2003, when it was supposed to land on Mars and start ...