In 2017, a weird-looking and behaving celestial body broke into . The solar system was observed by us. It was the first interstellar celestial body discovered by humans. The International Astronomical Union will officially number it as 1l/2017 U1. The name 1l/Oumuamua is commonly referred to as " 奥摩摩", which means "messenger" in Hawaiian.
Crimean astronomers discovered a comet in August 2019. Later analysis revealed that this comet came from outside the solar system and was the second interstellar object discovered by mankind. It is 2l/Borisov, and the English behind it is the name of the astronomer who discovered the comet.
These two interstellar celestial bodies outside the solar system do not pose any threat to the earth, but if another celestial body visits the solar system, will we still be so safe? For example, star , black hole or neutron star. We must know that there are countless stars in the universe. There are about 6,000 stars visible to the naked eye throughout the day on Earth. They are all stars in the Milky Way, and there are 200 billion similar stars in the Milky Way, and there are more than one trillion galaxies similar to the Milky Way.
What should we do if a star gets lost and approaches the solar system?
A star is flying at high speed and is coming straight to the solar system.
The solar system is located on a spiral arm of the Milky Way. This is the main gathering place of stars, about 26,000 light-years from . There are 200 billion stars of various ages in the entire Milky Way. The closest to the sun is Proxima Centauri, 4.22 light-years away, it is also a red dwarf star, which is difficult to observe on Earth with the naked eye , So the apparent magnitude is relatively high.
The sun brings eight planets around the galactic center,This is the trajectory of the solar system in the interstellar space , in fact, most of the stars that have an attribute are like this. But there are some stars that are out of the limit, they fly in their own way, such as Gliese 710 . This red dwarf star is fast on its own and is flying towards the solar system at high speed. It takes about 140 years for it to reach a distance of about 1.1 light years from the earth.
Gliese 710 The distance to the solar system is about 63 light years, which is not too far away, so scientists are still very worried about its negative impact on the solar system. This is not a comet or asteroid that will fall apart when it hits the earth's atmosphere, but a star, and its deterrent power is still great. So some people say that the solar system will usher in two suns in 1.4 million years.
's impact on the solar system and the earth
Gliese 710 is a red dwarf star with a mass smaller than the sun, but much larger than other planets. At its speed, the wandering star will approach the solar system after 1.4 million years. It may not break into the solar system, but it will fly very close to the solar system and reach the edge of the solar system.
The current size of the solar system is based on the gravitational range of the sun. The outermost layer is Oort Cloud, which is currently estimated to be 2-3 light-years in diameter, gathering in Oort Cloud The long-period comet in the solar system is the frontier of the solar system. It is a frozen world because the sun cannot reach it, but there are a lot of frozen celestial bodies. First of all, it can be determined that the wandering star visiting the solar system will not hit the solar system celestial bodies.But its gravitational interference is very large.
First, a large number of celestial debris, comets, and asteroids on the edge of the solar system will fly towards the solar system quickly after being disturbed by gravitational force. At that time, the earth will usher in a rare and destructive celestial impact event, just like The same asteroid that caused the extinction of the dinosaur 65 million years ago. Secondly, the eight planets are dragged by the gravitational force close to the star, and their flight speed and orbit will change visibly. This is a very big test for organisms that have adapted to the earth's environment.
Scientists believe that most of the stars around the solar system follow a specific orbit, but there are still some stray stars, and their trajectories will be close to the solar system.
Summary
Human technology is currently unable to resolve the impact of an asteroid hitting the earth, so facing the attack of a wandering star, there is no way to do it. It can only be passively accepted. Of course, the impact is temporary. They It will fly over the solar system at close range and finally leave, and the solar system will return to peace. But the premise is that the earth's creatures must survive that period of turbulence, and succeed in the past.
Text/Science black hole , picture source network invasion and deletion.
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