Amua flew from Outside the Solar System
It was expanding for decades.
In the solar system there are 750,000 asteroids and comets, which is considered to have all occurred in the solar system. But in October, a small object appeared from outside the solar system. That celestial body looked different as the image above, and the movement was quite different from the solar system celestial bodies.
The interstellar celestial body " Amua " The chemical compositions and properties of the Amua the revisedParrot found by the analysis are surprising for experts, and furthermore, the number of celestial bodies traveling between stars is more likely to be more than it was thought to date. It is something literary phrase, that is, estimated the number of interstellar celestial bodies so little.
First of all, the discovery Amua the revisedParrot on October 19, 2017, in the Hawaiian Telescope. It named" A / 2017 U1 " but it was incomprehensible, but it quickly became clear that this object is not normal. It was because the shape of the orbit was extremely hyperbolic, there was no indication that it was turning around the sun. When it was found, it was already away from the earth, and it was only a very short period of observation.
Though ordinary asteroid naming rules are supposed to never name things that we did not observe, researchers created a new classification for interstellar celestial bodies and put an unusual name " Amua the revisedParrot " It was. In the language of Hawaii, it means " a messenger who came for the first time from afar ".
Because the light observed from Amua the revisedParrot has changed greatly, its shape is not a sphere but is probably similar to a cigar, it is estimated that the length is about 800 m, the width, and the height are about 80 m. It is believed that the color is red and is made of metal or a material containing a lot of carbon. Until now, most of the rocks coming from the Alto clouds outside the solar system were comets, but the Amua was not a comet-like appearance, so this was a surprise too.
The researchers became turbulent with this discovery. A celestial object moving between stars was the first time that it was observed as though it existed itself, but it was said that it was "waiting for decades" on the above NASA's movie. Also, if found, its behavior was thought to be like a comet, not an asteroid. If the interstellar celestial body is an asteroid-like thing, it seems that this type of celestial body will fly far more in the solar system.
Then, the video, it seems almost like a near miss to the earth and the sun, but it really seems to be a serious thing if really hit it.
Yet nobody knows where Amua came from. In the thesis, are considering the possibility of coming from a debris disk near the Earth and the possibility that its trajectory was bent by other planets and comets. Perhaps it may have been influenced by the ninth planet which have not seen yet.
Amua is now far away from the Earth and will never be observed again. The possibility of finding interstellar objects in this kind is likely to continue in future.
