Rosetta’s OSIRIS camera witnessed Philae’s descent to the surface of Comet 67P/Churyumov-Gerasimenko.

For the next month or so you can see the return of periodic comet 2P/Encke (Encke’s Comet).

This week marks the pinnacle of the professional careers of many scientists, when the European Space Agency plans to put down a three-legged robotic lander on a comet, a risky first-of-a-kind endeavor that could rewrite textbooks on the history of the solar system.