NASA’s Voyager 1 probe emits a strange buzzing sound from space. NASA launched the Voyager 1 space probe 44 years ago. Today, it is the farthest man-made object from the Earth, very close to the solar system that left our solar system nine years ago. Since then, it has been exploring the near-emptiness of interstellar space and sending back valuable data to help us understand the world outside the solar system. Scientists now say that the instruments on the distant spacecraft have detected the “continuous hum” caused by the constant vibration of a small amount of gas in the interstellar space. According to research published in the journal Nature Astronomy, this continuous monotonous hum is the sound of plasma waves oscillating and is very faint.

A team led by Cornell University is studying data sent by Voyager 1 from 14 billion miles away. Stella Koch Ocker, a doctoral student at Cornell University in New York and one of the authors of the study, said the sound is very faint and monotonous because it has a narrow frequency band. You can listen to the sound here.

The Voyager 1 spacecraft flew by Jupiter in 1979, Saturn the following year, and then rose above the sun (the boundary between the solar system and interstellar space) in August 2012. Now it has reached the interstellar medium.

Previously, after passing through menopause, the Voyager 1 plasma wave system also detected oscillations in the gas, but this was caused by our sun.

The senior author of the study, James Cordes, said in a statement on the Cornell University website: “The interstellar medium is like quiet or gentle rain.”

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Now, researchers believe that there is more activity going on in the interstellar gas than previously thought. Voyager-1 data can help scientists understand the interaction between the interstellar medium and the sun’s solar wind (a steady stream of charged particles).

Cornell University scientist Shami Chatterjee explained why it is important to track interstellar space continuously. He said that scientists never had the opportunity to evaluate interstellar plasma, but when Voyager 1 flew over them and sent back data , They do it now.