Mercury, First Planet From the Sun: Latest Discoveries
Mercury is our solar system's smallest planet.
NASA's Messenger and Stereo-A space probes were...
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See photos of America's historic spaceport, Kennedy Space Center in Florida
The comet ISON is making what astronomers believe is its first trip through the inner solar system, taking a sweltering pass by the sun (making ISON a 'sungrazing' comet) and then back past Earth in December.
A look at the robotic spacecraft currently sending data home from beyond Earth orbit.
Comet Pan-STARRS has not disappointed astronomers and stargazers after surviving a close brush with the sun in March 2013, NASA says.
NASA's Solar TErrestrial RElations Observatory (STEREO) snapped imagery of the comet as it flew between the two planets. A three day time-lapse (March 9-12, 2013) was compiled from the photos.
The first spacecraft to orbit Mercury will have to shut down soon, unless it gets a mission extension.
NASA's Messenger probe snapped photos of 100 percent of the planet's surface.
Observations from NASA's Messenger probe indicate Mercury was once roiling with magma.
See amazing photos of Mercury taken by MESSENGER spacecraft in April 2011 through 2012.
The new Mercury video by NASA's Messenger spacecraft shows an oddly colorful planet.
NASA's Messenger spacecraft is the first dedicated to orbiting Mercury, the solar system's innermost planet.
Thousands images from NASA MESSENGER's wide angle camera comprise this rotating false-color mosaic map. The visible colors are correlated with variations in Mercury's surface spectral reflectance.
Find out when and where to look for the pink-looking planet.
The closest planet to the Sun (looking pinkish because of the hues of the setting Sun) and the Red Planet will be visible for all to see in February 2013. Find out when and where to look.