Tonight, the Rosetta spacecraft arrives at comet 67P/Churyumov-Gerasimenko. It will be the first mission in history to rendezvous with a comet, escort it as it orbits the Sun, and deploy a lander to its surface. Rosetta is a European Space Agency (ESA) mission with contributions from its member states and NASA.




Watch live coverage online from ESA , starting at 4 a.m. EDT/1 a.m. PDT (8 a.m. GMT) on Aug. 6.