Ceres reveals its salty secrets – and blurs the line between comets and asteroids
Thursday, December 10, 2015 - 09:57
in Astronomy & Space
When Guiseppe Piazzi reported his observations of a minor planet in 1801, he originally thought it might be a comet. But follow-up observations by fellow astronomers suggested that Ceres was actually an asteroid. So it's somewhat ironic that the latest results from NASA's Dawn mission suggest this asteroid is confusingly similar to a comet.