The Dawn spacecraft has started orbiting Ceres, the largest-known body in the asteroid belt between Mars and Jupiter, taking “close-up” images that scientists hope will reveal the mystery of a pair of bright spots on the dwarf planet – http://www.theguardian.com/science/2015/mar/06/dawn-starts-to-orbit-ceres-in-mission-to-photograph-dwarf-planet
More on the Dawn Mission here – https://plus.google.com/+dawnmission/posts
The 950km-wide object, known as Ceres, has been pictured at a resolution that exceeds anything seen previously by telescopes, even Hubble.
Nasa’s Dawn spacecraft can see details on the icy rock’s surface down to a scale of 22km per pixel. The new picture was taken on Monday, January 26th from a distance of 237,000km – http://www.bbc.co.uk/news/science-environment-31009791
See also: http://www.space.com/22891-ceres-dwarf-planet.html
Discovered in 1801, Ceres was once known as a planet, then reclassified as an asteroid. It was recast as a dwarf planet, like Pluto, in 2006.