Stars Sing But We Can’t Hear Their Songs, Researchers Claim
How strange it sounds when I utter ‘stars produce sounds?’ Well, I won’t have said that if the scientists have not eavesdropped on the surface of stars. Some experimental evidences support recent discovery about generation of sound by stars.
The discovery was made by scientists at the Department of Physics in the University of York. The team was examining the interactions between an ultra-intense laser and a plasma made target. This examination is related to fluids in motion that comes under a branch of physics called Hydrodynamics.
Conventionally, discoveries are not anticipated in the fluid dynamics studies, but the convention broke when the scientists observed that in the trillionth of second, when the laser strikes with plasma, the latter flowed from area with high density to stagnant regions of low density creating a “traffic jam” like scenario. Because of this extremely compact environment, plasma starts forming pile between the two ends with discrepant density. As a result of these impulsive movements of plasma, pressure pulses are formed which generate sound waves.
These sound wave pulsations have, however, extremely high frequencies which is enough to deprive human beings from listening the stars’ sounds. Frequency as high as a trillion hertz surprised the researchers too. To make it comprehensive, humans can only hear sounds with frequency up to 20,000 hertz, while bats and dolphins which are regarded as the best sound pickers can only make sense of sound with 100,000 hertz. This means the sounds of stars are couple of million folds higher than what is audible for humans and bats.
Researchers refer stars’ sounds to the melodious tunes. According to John Pasley, a physicist from the University of York and one of the scientists on the project:
“When they are accumulating new material stars could generate sound in a very similar manner to that which we observed in the laboratory – so the stars might be singing.”
Bad luck human, you can’t hear the songs of stars.