November 11, 2011 22:06
She was a shove out of the solar system.
In our solar system once there were nine planets, five of whom were giants. Ninth planet was literally push out the limits of the system, which saved the Earth from catastrophic destruction. So says astrophysicist David Nesvorny of the Southwest Research Institute in San Antonio.
When the sun turned 600 million years, and it has already started to gather around him the heavenly bodies, the major planets of hydrogen and helium — like Jupiter, Saturn, Uranus and Neptune — moved more erratically. At the time of their orbits have not been established, so they alienate smaller space bodies. Some of them flew outside the system, in the Kuiper belt, and some hit the other, which is closer to the Sun, and consisted of iron and silicate.
However, during this chaotic collision orbit of Jupiter changed gradually, giving greater inertia of the inner planets — Venus, Earth and Mars. Sooner or later it had to completely destroy the solar system. But something prevented Earth from dispersal to crash into Mars or Venus.
Nesvorny colleagues proposed a theory of "jumping Jupiter." Its essence is that this planet is dramatically changed its orbit, rebounding from Uranus or Neptune, I passed by them, and took the usual place in the system, we know. Since Jupiter is no longer affect the orbits of the inner planets and let them excessive momentum. This saved the Earth from a catastrophic end 4 billion years ago.
But the story does not end there. Such a motion must necessarily be shove Neptune beyond the solar system. And it is in place. American researchers have conducted more than 800 computer-based and created 40 different models to figure out why, with "jumping Jupiter" everything was in place.
And a recent experiment has clarified the situation. According to mathematical calculations, the planet once had nine. Located beyond Neptune another giant gas formation. Jupiter pushed the ninth planet in the solar system, and it took its present appearance.
"It's like a multi-pass game, such as chess. As a result of these movements was saved Earth, where he created the conditions for the emergence of life. In chess, to save the queen, you sacrifice a pawn, "- said Nesvorny.