For several years, a satellite orbiting Mars has seen streaks flowing from Martian mountains during warm periods on the surface. Scientists have now confirmed that water is involved.
NASA/JPL/University of Arizona
An Oct. 8, 2014, photo shows the blood moon, created by the full moon passing into the shadow of Earth during a total lunar eclipse, as seen from Monterey Park, Calif. Sky-watchers will get a chance to see another "blood moon" eclipse on Sunday.
The Occator crater on the dwarf planet Ceres holds bright spots that are unlike any other area on the planet's surface, NASA says. This image's resolution is around 450 feet per pixel.