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Tsunami flies through interstellar space to the solar system - VIDEO PDF Print E-mail
Wednesday, 17 December 2014 19:46

"The tSunami" that NASA spacecraft Voyager 1 began to observe this year, continues to spread. It is the longest lasting and shock waves that researchers have ever seen in interstellar space.

"People may think that interstellar space smooth and quiet. But these shock waves were more common than we thought," - said Don Gurnett, professor of physics at the University of Iowa in Iowa City. On Monday, December 15 at the meeting of the American Geophysical Union in San Francisco Gurnett presented new data.

"TSunami wave" occurs at the moment when the Sun emits magnetic cloud of plasma that is going on coronal mass ejections that generates a pressure wave that. When the shock wave passes into the interstellar plasma, it breaks it.

This is the third shock, experienced by Voyager 1. For the first time this has happened in October 2012, the second time - in April 2013, when the plasma density wave was even higher. The latest wave of Voyager 1 discovered in February and watches so far. The spacecraft during this time was 250 million miles (400 million kilometers).



"This is a significant event raises questions that stimulate us to new research into the nature of shock waves in the interstellar medium," - said Leonard Burlaga, honorary astrophysicist Space Flight Center, NASA Goddard in Greenbelt, Maryland.

Researchers do not understand, which could mean an unusual longevity of this wave. They also do not know how fast the wave moves, and how big the area it covers.

The second "tSunami" in 2013 helped researchers determine that Voyager 1 has left the heliosphere - the bubble created by the solar wind, covering the Sun and the planets of our solar system. Dense plasma ring at a higher frequency and a medium through which flew Voyager, were 40 times denser than what has been measured ever before. This meant that Voyager entered the space where never before did not reach the spacecraft.

"The farther comes to Voyager, the higher the density of the plasma," - said Ed Stone, project scientist mission Voyager, based at the California Institute of Technology in Pasadena. "Is this because the interstellar medium becomes denser, the farther away from the heliosphere, or is it the effect of the shock wave? We do not know," - he added.

Gurnett, principal investigator for the plasma waves, suggests that such a shock wave propagates far into space, perhaps even at a distance of two times more than the current distance between the Sun and Voyager.


НАЖМИТЕ ЗДЕСЬ ДЛЯ ПРОСМОТРА ВСЕГО СПИСКА НОВОСТЕЙ О НЕОБЫЧНЫХ ЯВЛЕНИЯХ>>>

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