Scientists are edging ever closer to discovering what transformed Mars from a water-rich planet to the arid desert that it is today.
NASA's Dawn spacecraft has beamed back the closest-yet views of Ceres. The new pictures reveal unprecedented details of Ceres' tall, conical mountain.
NASA is gearing up to study the environmental and societal effects of climate change.
NASA's New Horizons mission has now passed Pluto, but it's still sending back data about the planet. Now, researchers are revealed new images of the dwarf planet and have created a simulation using them.
NASA has officially selected the next potential destination for the New Horizons mission to visit.
Sea levels may be rising-and fast. New NASA research reveals that sea levels are rising far faster than anyone expected.
The NASA/ESA Hubble Space Telescope has captured a spectacular new image of the Twin Jet Nebula. The new picture highlights the nebula's complex shells and its knots of expanding gas in striking detail.
NASA's Dawn spacecraft is showing sharper scenes than ever before as it continues its exploration of the world.
It turns out that a Greenland glacier may be melting far faster than anyone suspected. New NASA satellite images reveal that the Jakobshavn glacier may have lost a massive chunk of ice, possibly setting a new record.
NASA's Cassini spacecraft is saying good-bye to Saturn's moon Dione after its mission there. Now, it's captured a spectacular image of the moon, taken during its last close approach to the icy world.
Recently, many blogs and web postings have claimed that an asteroid will impact Earth at some point between Sept. 15 and Sept. 18. Fortunately for Earthlings everywhere, though, this isn't true.