While I am in one of my classes, the lander from the European Space Agency’s Rosetta spacecraft will harpoon and land on the comet 67P/Churyumov-Gerasimenko (Credit: ESA/Rosetta/NAVCAM):
If you’re not in class, you can watch the landing live here (well, you can hear talking about it) or you can check out the xkcd comic which updates with the time until landing. This mission was launched on March 2, 2004, so there’s a bit of anxiety as we await word to see if lands successfully.
Update: And it has landed on the comet. Score one for science.