Here's something you don't hear every day: The sound of a comet whizzing through outer space.
The Rosetta spacecraft has captured the sound emitted by Comet 67P/Churyumov-Gerasimenko, which is produced by "oscillations in the magnetic field in the comet's environment." Space.com says that it's such a faint noise that the European Space Agency had to increase the frequency of the sound by about 10,000 times its actual rate so it could be heard.
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