A complex mission to Mercury that began its epic space voyage six years ago has encountered critical thrust problems that controllers say could imperil...
Mars is collecting artifacts.Without the large, powerful camera aboard NASA's Mars Reconnaissance Orbiter, which observes Martian terrain for past evidence of water and how...
An MIT astronomy class has found three of the oldest stars in the universe lurking right outside the Milky Way. The stars, about 30,000 light-years...
