The crescent Earth rises above the lunar horizon in this spectacular photograph taken from the Apollo 17 spacecraft in lunar orbit during final lunar landing mission in the Apollo program.
Like their semi-divine namesakes, Dione's twin craters Romulus and Remus (just above-right of center) stand together.
The Cassini spacecraft and Huygens probe begin their seven-year journey to the ringed planet. The successful launch of Cassini aboard a Titan IVB/Centaur occured at 4:43 a.m. EDT, October 15, 1997.
This image of Licinia AV-L-08, from the atlas of the giant asteroid Vesta, was created from images taken as NASA's Dawn mission flew around the object, also known as a protoplanet.
This composite image from NASA's Dawn spacecraft is a simulated true color image of asteroid Vesta's northern and equatorial regions.
This image of Sextilia AV-L-26, from the atlas of the giant asteroid Vesta, was created from images taken as NASA's Dawn mission flew around the object, also known as a protoplanet.