As NASA's Dawn spacecraft approaches orbit around the dwarf planet Ceres, researchers aren't sure what's causing the "bright spots" on its surface. The imaging orbiter snapped the above picture from 29,000 miles (46,000 km) away just last week, but until it gets closer for a more detailed picture, the folks at NASA aren't ready to decide the light sources' origin. "The brightest spot continues to be too small to resolve with our camera, but despite its size it is brighter than anything else on Ceres," said Andreas Nathues, a lead investigator at the Max Planck Institute for Solar System Research in Germany. "This is truly unexpected and still a mystery to us."One theory is that the light could indicate volcano-like formations, but higher-resolution snapshots will give the team a better idea of exactly what its observing. If you'll recall, scientists have already concluded that Ceres contains water, based on spewing vapor from its surface from a undetermined source. Dawn is scheduled to enter orbit around Ceres on March 6th, beaming back imagery for a 16-month period from the asteroid belt that resides between Mars and Jupiter.
Scientists puzzled by 'bright spots' on surface of dwarf planet Ceres
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