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A mysterious 'hum' vibrates interstellar space

Dragon
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A mysterious 'hum' vibrates interstellar space Empty A mysterious 'hum' vibrates interstellar space

Post by Dragon Sat May 15, 2021 4:28 am

Forty-four years after it rocketed off from Earth, the Voyager 1 spacecraft is detecting the background "hum" of interstellar space for the first time.

Voyager 1, launched in 1977, left the bounds of the solar system — known as the heliosphere — in 2012. The heliosphere is the bubble of space influenced by solar wind, the stream of charged particles that emanates from the sun.

Since popping out of this bubble, Voyager 1 has been periodically sending back measurements of the interstellar medium.

Now, though, researchers have realized that Voyager 1 is also sending back a far more subtle signal: the constant "hum" of the interstellar plasma.

This low-level vibration is fainter, but much longer-lasting, than the oscillations that occur after coronal mass ejections.


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A mysterious 'hum' vibrates interstellar space 334pu7m
Dragon
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A mysterious 'hum' vibrates interstellar space Empty Re: A mysterious 'hum' vibrates interstellar space

Post by Dragon Sat May 15, 2021 4:31 am

A mysterious 'hum' vibrates interstellar space 7FpLzsQyVKUTRZUuh8V6UC-1024-80.jpg
(Image credit: NASA/JPL)

An illustration of the Voyager 1 spacecraft, which is traveling through interstellar space.


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A mysterious 'hum' vibrates interstellar space 334pu7m
Dragon
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A mysterious 'hum' vibrates interstellar space Empty Re: A mysterious 'hum' vibrates interstellar space

Post by Dragon Sat May 15, 2021 4:33 am



Voyager Captures Sounds of Interstellar Space

After 44 years of travel, Voyager 1 is the most distant human-made object in space.


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A mysterious 'hum' vibrates interstellar space 334pu7m

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