Curiosity rover launched on November 26, beginning its long journey to Mars.
Newly discovered dwarf galaxies are fast and furious in their production of stars.
Astronomers observe a rare supernova in progress--the closest to Earth in nearly a century.
The WISE mission catches sight of a faint, elusive type of brown dwarf.
Scientists suspect a distant planet has a magnetic field.
The MESSENGER satellite has returned the first images from its orbit around Mercury.
A close view of the asteroid Kleopatra and its two moons gives clues to planet formation.
Become a citizen scientist and help measure light pollution in your area.
A NASA X-ray telescope reveals an unusual ring of eight black holes.