Observed from outside the solar system, "Vorisov Comet", November 25 8:24

“Comets” coming from outside the solar system are approaching, and observations of rare visitors from outside the solar system have begun at observatories in various places.

This comet was discovered in August by an overseas amateur astronomer, and was named “Borisov Comet”. When we analyzed the orbit, it came from far away from the solar system. It was confirmed for the first time as a comet.

Astronomical observatories around the world have begun observations as they approach the sun and the earth over the next month, and NASA's Hubble Space Telescope captured the image on the 12th of last month. , Dust was observed around it.

In addition, in the video observed by Shigeyuki Sakeyuki's group at the University of Tokyo on the 16th of this month, the brightness has increased to about 16 mag, and the “tail” of the comet is clear, moving in the direction of Leo. It was confirmed that

It is known that the comet of Borisov is very different from a general comet, and it passes between Mars and Jupiter to penetrate the solar system and then moves away from the solar system.

Around 8th of the month when the distance from the sun is closest, it is expected that it will be observable by an experienced amateur astronomer who is 15 mag in brightness.

Also, comet experts have analyzed the components contained in the tail and made plans to observe differences from the comet in the solar system. The

May bring valuable information such as stars outside the solar system ...

Objects from outside the solar system are called “interstellar objects”, and for the first time, asteroids have been confirmed for the first time. This is the first time for a comet, and only two cases have been confirmed so far.

The first asteroid that was observed for the first time was named “Aum Amua”, and it attracted interest because it was an unfamiliar elongated shape, but when it was discovered it was already at a stage away from the solar system, so observe in detail Couldn't

On the other hand, this comet is the first comet, and unlike the asteroid, it has a “tail”, which makes it easier to analyze the contained components.

In addition, “Borisov Comet” was discovered at the stage of approaching the solar system, so the people concerned are waiting to observe it and may provide valuable information about stars and planetary materials outside the solar system. We pay attention as.