Recent science news headlines have proclaimed that the intriguing mystery of the bright spots on the dwarf planet Ceres has been resolved. According to a paper recently published in the journal Nature, investigators with NASA’s DAWN mission have ruled out that the source of the bright spots is ice, and have instead decided they are most likely a large salt deposit. Other recent analysis from scientists at the Max Planck Institute in Germany suggests that the bright spots are caused by a combination of salt and some water ice. In this Space News, we ask Thunderbolts Picture of the Day managing editor Steve Smith to explore this and other questions about the mysterious dwarf planet.
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