The European Space Agency's Rosetta probe detected a mysterious "song" emanating from Comet 67P/Churyumov-Gerasimenko. Rosetta on Nov. 12 landed its Philae robotic lander on the surface of the comet to study its composition and terrain.

Sounds emanating from the comet seem to be oscillations produced by the magnetic field surrounding the comet, said ESA scientists. A set of instruments aboard the space probe called the Rosetta Plasma Consortium picked up these sound waves while Rosetta was orbiting the comet.

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To hear what Comet 67P sounds like, here's a link of its audio recording: https://soundcloud.com/esaops/a-singing-comet 

The comet's "song" isn't readily audible to the human ear due because it's in the 40 to 50 millihertz range below the range of  human hearing. Only sounds from 20 hertz to 20 kilohertz can be picked up by the human ear. Rosetta mission scientists have increased the frequencies up to 10,000 times to make the comet's sounds audible.

The plasma environment of Comet 67P was detected by a suite of five instruments. Plasma is considered the fourth state of matter in which electrical particles charge a gas that carries magnetic fields and electric currents.

Instruments aboard the probe are designed to study comet events such as solar winds from the sun, dynamic activity on the comet, the structure of the comet's surrounding plasma atmosphere known as coma along with the composition of the comet's icy nucleus.

The sounds were first heard in August when Rosetta's magnetometer detected the sounds at 62 miles. Scientists believe these vibrations are being produced by the comet's dynamic activity as it heads towards the sun and neutral particles became ionized. To date, these oscillations still remain a mystery, as does the process that induces these sounds.

Rosetta is currently orbiting Comet 67P. The Rosetta mission was conceived in 1993 and since 2004, Rosetta has been travelling in deep space and rendezvoused with the comet last August. Scientists believe comets are ancient relics that hold secrets of the birth of the solar system.

TagsHear Comet 67P's Song Courtesy of the Rosetta Probe, ESA, rosetta, philae lander, comet 67P, comet landing, comet 67P song rosetta esa