At first glance, the dwarf planet Ceres hardly inspires dreams of alien life. Orbiting between Mars and Jupiter in the asteroid belt, it is a frigid, gray world, battered and cracked. Its surface ...

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The International Astronomical Union (IAU) currently recognizes five dwarf planets in our solar system, though there are likely many more. The most famous of the bunch is Pluto, way out beyond the ...

Millions of images of celestial objects, including asteroids, observed by NASA's Near-Earth Object Wide-field Infrared Survey Explorer (NEOWISE) spacecraft now are available online to the public. The ...