Rosetta's Singing Comet

A set of instruments on the European Space Agency's Rosetta spacecraft has picked up a mysterious "song" from Comet 67P/Churyumov-Gerasimenko. On Wednesday, Nov. 12, Rosetta will attempt the first-ever soft landing on a comet when it dispatches its Philae lander to the surface of comet 67P.

The sounds are thought to be oscillations in the magnetic field around the comet. They were picked up by the Rosetta Plasma Consortium -- a suite of five instruments on the spacecraft that is orbiting the comet.