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Eerie Sound Detected from Rosetta’s Comet and It Sounds Like Predator

 Rosetta's Comet

Image credit: Artist’s impression of the ‘singing comet’ 67P/Churyumov-Gerasimenko. Credit: ESA/Rosetta/NavCam

The Rosetta spacecraft and its Philae lander will help scientists better know about the real picture of Comet 67P/Churyumov-Gerasimenko as well as its smelling. However is it possible to know what the comet sound like?

The day before Philae had its historical landing on the surface of the comet; an audio clip depicting the singing of 67P/C-G was released by ESA. It was unfortunate that its song was somehow creepy as hell and did sound just like Predator, the alien who endeavored to kill Arnold Schwarzenegger.

Actually, it could not be a direct audio recording, because it was impossible for sound waves to travel through space. In fact, Rosetta’s Plasma Consortium (RPC) collected variations in the magnetic field around the comet, due to interactions between the plasma from the Sun, also know as solar wind and 67P/C-G’s coma. Such variations could lead to the frequencies ranged between 40 to 50 millihertz, nearly 10,000 times lower than humans could be able to detect. So the researchers from ESA changed the frequency of the comet’s song into the range in which human could hear. To their surprise, they found it was a series of clicks which would remind people of the growl of Predator.

When Rosetta got near to the comet, RPC scientists first collected these fluctuations in August, however, they were not sure about the cause of such fluctuations.

As Karl-Heinz Glaßmeier, the RPC principal investigator said, scientists were excited about it because they had never expected this before and they were trying very hard to find out the physics of it.

For the time being, it was guessed by the team that neutral material that was shedding off of the comet got ionized, or charged, by the solar wind. But at this stage, the mechanism that would finish that task remained unknown.

If you want to listen to Predator’s clicking growl, please click here to hear that amazing sound.

Source: CNET