The recent computer simulation of the solar system has revealed possible threats to the attractiveness of passers -by.
Scientists warn that such stars can cause Earth to collide with another planet, or on the contrary, our planet throws near the sun or very far from the sun, which will lead to the end of life on Earth.
The main perpetrator is mercury. Astronomers have long noticed that its oval orbit can become more oval under the insult of Jupiter gravity. Passing stars make the problem worse, Nathan A. Kaib from the Planetary Science Institute in Iowa and Shawn Raymond from the Bordeaux University report in A. paper It was published on May 7 on Arxiv.org.
Modeling shows that under certain circumstances, the orbit of Mercury may become so unstable that it will collide with the sun or Venus. This can lead to a collision of a series of a collision of Venus or Mars with the Earth, and the Earth collides with the sun. Jupiter’s attractiveness can also take the Earth out of the solar system.
However, the possibility of such a scenario is still very low. Over the next 5 billion years, which is most of the remaining sun, the risk of a earth is only 0.2 %.
This is much higher than what previous studies suggested, which did not explain the long -term effects of passers -by.
The most dangerous stars of the solar system are those in less than 100 astronomical units of the sun. Their close approach in the next 5 billion years is about 5 %. The animated stars are also slowly dangerous, because their gravitational effect can last longer.
Interestingly, the new models indicate that Pluto, who was believed to be a safer place than the ground, may be in a more vulnerable position. Pluto in Echo 3: 2 with Neptune, which prevents him from collision with this planet.
However, if the stabilizers disturb this stability, Pluto may collide with the giant planets or completely remove them from the solar system. The possibility of such an event over the next 5 billion years is about 4 %, which is 20 times higher of danger on the ground.
