We fly through the galaxy is not as fast as previously thought

12.05.2012

It is known that the sun and all the planets with him fly through the interstellar medium, moving around the galactic center. But it turns out that the movement is not as fast as previously thought.
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The sun and all the planets with him fly through the interstellar medium, moving around the galactic center

The data that have allowed scientists to make such findings were obtained using space research vehicle Interstellar Boundary Explorer, or just IBEX. The aim of this study is to run the heliosphere — the hypothetical area of space where the solar wind is weakened so much that he can not resist the flow of ionized interstellar gas. At this point of equilibrium of forces most retained interstellar charged particles, but neutral atoms of hydrogen, helium and oxygen penetrate further toward the sun. Thus, the data can be captured by the atom probe IBEX and studied in detail. In the process of learning can understand the processes occurring in the heliosphere.

It was in the course of the study of these atoms, it became clear that the velocity of the solar system in the interstellar medium is not as high as previously thought. Moreover, on the border of the solar wind propagation of the shock wave does not arise. To better understand how a shock wave from the solar wind, it can be compared with the air through when it flies at supersonic speed aircraft. At the moment when the aircraft speed overcomes the sound barrier, the air can not leave the aircraft path quickly enough, resulting in a shock wave and. However, the speed of movement of the sun, is not sufficient to a distance of 16 billion kilometers shock wave formation.

More precise speed of the solar system in the interstellar medium has been estimated as 23.25 miles per second, which is a whopping 3.13 kilometer smaller than previously thought. Our star is not the case for those who interact with the interstellar medium is so strong that the resulting shock wave.

 

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