PARIS, July 17 (UPI) -- The European Space Agency's Rosetta probe has been gearing up to attempt a comet landing. Recently, the craft discovered something surprising about its intended target, Comet Churyumov-Gerasimenko.
The comet is actually two comets in one -- conjoined twins, or more technically, a "contact binary." As seen in the images captured by Rosetta, Churyumov-Gerasimenko's newly discovered sidekick is slightly smaller and looks as if it was just smashed into the side of the larger mass, like two pieces of clay. Together they measure about 2.5 miles around.