Quote:The mission has five instruments in the Rosetta Plasma Consortium (RPC) that measure the plasma environment surrounding the comet. Plasma is a charged gas and the RPC is tasked with understanding variations in the comet’s activity, how 67P’s jets of vapor and dust interacts with the solar wind and the dynamic structure of the comet’s nucleus and coma.
But when recording signals in the 40-50 millihertz frequency range, the RPC stumbled on a surprise — the comet was singing.
Article : http://news.discovery.com/space/comet-si...141111.htm
Sound File: https://soundcloud.com/esaops/a-singing-comet
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