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Voyager 1 Detects Plasma Waves in Interstellar Medium

Dragon
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Post by Dragon Tue May 18, 2021 5:25 am

Launched in September 1977, NASA’s Voyager 1 spacecraft flew by Jupiter in 1979 and then Saturn in late 1980.

In August 2012, it crossed the heliopause and became the first in situ probe of the very local interstellar medium.

Now, using data from the Plasma Wave System on Voyager 1, a team of researchers from Cornell University and the University of Iowa has detected very weak plasma wave emission in the interstellar medium.


Source


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Voyager 1 Detects Plasma Waves in Interstellar Medium 334pu7m
Dragon
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Post by Dragon Tue May 18, 2021 5:26 am

Voyager 1 Detects Plasma Waves in Interstellar Medium Image_9649-Voyager-1
Image credit: NASA / JPL-Caltech.

Illustration of NASA’s Voyager spacecraft showing the antennas used by the Plasma Wave Subsystem and other instruments


Source / Image Courtesy


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Voyager 1 Detects Plasma Waves in Interstellar Medium 334pu7m
Dragon
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Post by Dragon Tue May 18, 2021 5:28 am



Voyager Captures Sounds of Interstellar Space

NASA's Voyager 1 spacecraft captured these sounds of interstellar space. Voyager 1's plasma wave instrument detected the vibrations of dense interstellar plasma, or ionized gas, from October to November 2012 and April to May 2013.

The graphic shows the frequency of the waves, which indicate the density of the plasma.
Colors indicate the intensity of the waves, or how "loud" they are.

Red indicates the loudest waves and blue indicates the weakest.

The soundtrack reproduces the amplitude and frequency of the plasma waves as "heard" by Voyager 1.

The waves detected by the instrument antennas can be simply amplified and played through a speaker.

These frequencies are within the range heard by human ears.

Scientists noticed that each occurrence involved a rising tone.

The dashed line indicates that the rising tones follow the same slope. This means a continuously increasing density.


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Voyager 1 Detects Plasma Waves in Interstellar Medium 334pu7m
Dragon
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Post by Dragon Sat May 22, 2021 3:31 am

Voyager 1 Detects Plasma Waves in Interstellar Medium Voyager1
Credit: Pixabay/CC0 Public Domain

Voyager 1 left Earth carrying a Golden Record created by a committee chaired by the late Cornell professor Carl Sagan, as well as mid-1970s technology.

To send a signal to Earth, it took 22 watts, according to NASA's Jet Propulsion Laboratory. The craft has almost 70 kilobytes of computer memory and—at the beginning of the mission—a data rate of 21 kilobits per second.

Due to the 14-billion-mile distance, the communication rate has since slowed to 160-bits-per-second, or about half a 300-baud rate.


Source


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Voyager 1 Detects Plasma Waves in Interstellar Medium 334pu7m

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