Liquid water apparently flowed on the surface of the huge asteroid Vesta briefly in the relatively recent past, a surprising new study suggests.
A NASA spacecraft en-route to the largest body in the asteroid belt between Mars and Jupiter returned its sharpest images yet of its target, the dwarf planet Ceres.
NASA has released radar observations of the 325 meter-wide asteroid that flew safely past Earth today, but in those grainy observations, asteroid 2004 BL86 appears to have company -- a small moon.
Comet 67P/Churyumov-Gerasimenko is shedding its old dusty coat and Europe's Rosetta mission is catching the individual flakes to understand some fascinating cometary dynamics.
A strange, flickering white blotch found on the dwarf planet Ceres by a NASA spacecraft has scientists scratching their heads.
Early results from Europe’s ongoing Rosetta comet mission show the icy body, believed to be a remnant from the formation of the solar system, is far more complex and diverse than scientists expected.
Jan. 19, 2015, was a red letter day for NASA's Solar Dynamics Observatory -- one of its instruments, having continually stared at the sun for 5 years, captured its 100 millionth observation of our nearest star.
As NASA's trailblazing Dawn mission approaches dwarf planet Ceres, a new series of images beamed back show intriguing details.
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