Landing the first spacecraft on a comet.

The European Space Agency's Philae lander, which detached from the Rosetta spacecraft around 1 a.m. PT Wednesday morning, successfully touched down on comet 67P/Churyumov-Gerasimenko seven hours later. A confirmation signal was sent to the mission control center in Darmstadt, Germany, indicating that Philae is now officially along for the ride. More information here: or http://www.cnet.com/news/welcome-to-the-comet-rosetta-mission-makes-space-history/