A spacecraft landed on the surface of a comet for the first time ever today, the European Space Agency confirms. The 220-pound Philae lander successfully made its way to the surface of 67P/Churyumov-Gerasimenko, as part of the agency's 10 years in the making Rosetta mission.

This is a very brief video about a marvelous friendship between a Cheshire cat grin of a moon and what looks like his comet buddy chasing after him.

On November 28, 2013, newly discovered comet C/2012 S1 should be brighter than the full moon. Suck it, Hale-Bopp.

Brain friends! Comet comparisons! DNA crime laws! Energy drink deceptions! Monster phalanges! Space sex! It's your Monday Science Watch, where we watch science—friendlessly, endlessly, relentlessly!