The European Space Agency’s Rosetta probe has reached 67P/Churyumov-Gerasimenko and is maneuvering to go into orbit around the comet’s core.
This is an historic event. After Rosetta goes into orbit, it will follow the comet around the sun, observing its activity from point-blank range for more than a year.
Moreover, in November, Rosetta will drop a lander onto the comet’s strange surface.
Today’s events are being streamed live by the ESA.