The space probe was released for the first time in the history of the solar system

21.03.2013

NASA interplanetary probe "Voyager 1", launched 35 years ago, crossed the border into the heliosphere and became the first man-made object, left the solar system, U.S. researchers write in a paper accepted for publication in the journal Geophysical Research Letters.

"It seems that the" Voyager 1 "left the region, which is dependent on exposure to the sun, the data show such characteristics of hydrogen and helium, which are expected to be observed in the interstellar medium" — written by Bill Webber of the University of New Mexico and his colleagues.

The boundary of the solar system is the so-called the heliosphere — the "bubble" filled with the solar wind. Beyond it begins interstellar space, the property is no longer independent of the magnetic field, or from a stream of charged particles emanating from the sun.

According to scientists, August 25, 2012 probe, which was at that time at a distance of 121.7 astronomical unit (average radii of the earth's orbit) from the Sun, "felt" a sudden change in the flow of cosmic rays of different origin. Within a few days the flow of protons and alpha particles with energies of 1.9-2.7 MeV coming from the sun, declined by about 300-500 times. The intensity of galactic cosmic rays has doubled.

"Within a few days, the intensity of the heliospheric radiation decreased, and the intensity of cosmic rays increased, which we expect to happen in the near region of interstellar space," — says Webber was quoted as saying in a statement of the American Geophysical Union (AGU).

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