Voyager 1 "Ride" Tsunami Inter Star

Astronomy Science ~ Voyager 1 spacecraft is still riding the 'tsunami' massive first began in February. This is the longest shock ...

Astronomy Science ~ Voyager 1 spacecraft is still riding the 'tsunami' massive first began in February. This is the longest shock wave that the researchers saw in interstellar space. Experts said the findings make them rethink how 'the end of the space' work.

"Most people would think, the interstellar medium will be smooth and quiet. But this shock wave appears to be more common than we thought," said Don Gurnett, professor of physics at the University of Iowa. He presented the new data at the American Geophysical Union meeting in San Francisco. A 'tsunami' occurs when the sun emits a coronal mass, dispose of the magnetic cloud of plasma from the surface. This generates a pressure wave. When the waves run into interstellar plasma (charged particles found in the space between the stars), the result is disturbing plasma shock wave and causes 'sing'.

Voyager 1 Illustration
'This tsunami caused ionized gas out there be resonating -' singing 'or vibrate like a bell, "said Ed Stone, Voyager project scientist for the mission based at the California Institute of Technology in Pasadena. This is the third shock wave experienced by Voyager 1. The first incident occurred in October and November 2012, and the second wave from April to May 2013 which revealed a higher plasma density.

Voyager 1 detects this new event in February, and it was still going on as data is received on September. The spacecraft has moved out as far as 250 million miles (400 million kilometers) during the third event. "This incredible event which raises questions that will stimulate new research on the nature of the shocks in the interstellar medium," said Leonard Burlaga, an astrophysicist at NASA Goddard Spaceflight in Greenbelt, Maryland, who analyzed the data of this magnetic field.

It is unclear how the durability of the shock wave is over and was not sure how the speed of the wave is moving or how an area that covers that. The second wave of the tsunami in 2013 helped researchers determine that Voyager 1 has left the heliosphere, the bubble created by the solar wind that includes the sun and planets in our solar system.

This is the key to reveal that Voyager has entered the border where no spacecraft that go far: interstellar space. "The further Voyager went, the more dense plasma," said Stone. "Is it because it is more dense interstellar medium when Voyager moves away from the heliosphere, or whether it was from the shock wave itself? We do not know."

Gurnett, principal investigator of the plasma wave instrument on Voyager, hoping that the shock wave propagates farther into space, maybe even propagate at a distance twice the distance between the sun and the spacecraft's location now. Voyager 1 and its twin, Voyager 2, which was launched 16 days apart in 1977. The two spacecraft flew past Jupiter and Saturn.

Voyager 2 also flew across Uranus and Neptune. Voyager 2, were launched before Voyager 1 spacecraft is the longest mission and operated continuously and is expected to enter interstellar space in the next few years.
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Astronomy Science: Voyager 1 "Ride" Tsunami Inter Star
Voyager 1 "Ride" Tsunami Inter Star
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