Voyager 1, which is the farthest human-made object from Earth and the first to enter interstellar space, has been detecting a "faint, persistent hum" that scientists have attributed to interstellar gas.
Phys.org, citing research published in Nature Astronomy, reported that the spacecraft’s Plasma Wave System has picked up a "persistent signature produced by the tenuous near-vacuum of space."
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James Cordes, a professor of astronomy at Cornell University, reportedly described the sound as a "quiet or gentle rain."
"In the case of a solar outburst, it’s like detecting a lightning burst in a thunderstorm and then it’s back to a gentle rain," he said.
Stella Koch Ocker, a doctoral student at the university, who lead the research, said, "We're detecting the faint, persistent hum of interstellar gas. It's very faint and monotone, because it is in a narrow frequency bandwidth."
Voyager 1′s odyssey began in 1977 when the spacecraft and its twin, Voyager 2, were launched on a tour of the gas giant planets of the solar system.
After beaming back dazzling postcard views of Jupiter’s giant red spot and Saturn’s shimmering rings, Voyager 2 hopscotched to Uranus and Neptune. Meanwhile, Voyager 1 used Saturn as a gravitational slingshot to power itself past Pluto.
It is now about 15 billion miles from Earth.
Voyager 1 is about the size of a subcompact car and carries instruments that study magnetic fields, cosmic rays and solar wind.
The Associated Pres contributed to this report
https://news.google.com/__i/rss/rd/articles/CBMiWGh0dHBzOi8vd3d3LmZveG5ld3MuY29tL3NjaWVuY2Uvdm95YWdlci0xLWRldGVjdHMtaHVtLXdoaWxlLWluLWludGVyc3RlbGxhci1zcGFjZS1yZXBvcnTSAVxodHRwczovL3d3dy5mb3huZXdzLmNvbS9zY2llbmNlL3ZveWFnZXItMS1kZXRlY3RzLWh1bS13aGlsZS1pbi1pbnRlcnN0ZWxsYXItc3BhY2UtcmVwb3J0LmFtcA?oc=5
2021-05-11 07:15:16Z
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