With One More Comet Landing Rosetta’s “Rock and Roll” Mission is Ended

Rosetta is down. I repeat: Rosetta is down. This morning, Sept. 30, 2016,¬†just after¬†10:39 UTC (6:39 a.m. EDT) ESA’s Rosetta spacecraft ended its mission with an impact onto the surface of the comet 67P/Churyumov-Gerasimenko. The descent, begun with a final burn of its thrusters about 14 hours earlier, was slow, stately, and deliberate, but even…