2 Comets Collided to Form Rosetta's 'Rubber Ducky' Target
Thursday, October 22, 2015 - 11:30
in Astronomy & Space
The strange shape of Comet 67P/Churyumov-Gerasimenko, which the European Space Agency's Rosetta spacecraft has been studying for more than a year, arose from the long-ago collision of two separate, slow-moving comets, researchers say.