The brightness of Betelgeuse in Orion suddenly darkened. Will it explode like a supernova?

Winter is a season. It is Orion and Sirius, or the brightest star in the night sky. 8.6 light years from the Earth, line of sight 1.46. Then on Sabre's shoulder, the light of M42 could be faintly seen. You will be surprised to find that it is on the right shoulder of Orion! Betelgeuse is a famous bright star in Orion and the only star in the solar system that is close to a supernova. Its mass is 14- 15 times that of the sun, but it has expanded to 700 million times, and it is on the verge of large-scale expansion, and supernovae may occur at any time! Areca is the ninth brightest star in the Orion sky.

? Hoecherl first discovered that Areca catechu is a variable star with photometric changes in 1836. He found that betel nut appeared at 1840, and then gradually decreased, with an obvious short-term change at 1849, and reached the peak at 1852, and the brightness change was very obvious every time. But there are also some people who haven't changed much in the last ten years.

It is about 14- 15 times the mass of the sun, and has evolved into a red giant phase at the end of the star, losing the mass of the outer layer of the star and the pulsation of the variable star. Its diameter is also between 0.043 and 0.056 arc seconds, and the estimated diameter has a great error. But what is certain is that it is closest to the earth. If placed at the diameter of the largest star, the edge of the solar system can reach nearby. But it may explode like a supernova at any time in the future, which is particularly interesting, because the life span of supermassive star Betelgeuse is only 6.5438+million years. It may explode as a supernova, but it is only 640 light years away, so it will take some time to see it.

Stars whose mass is 8- 10 times that of the sun are considered as neutron stars that will undergo supernovae in the future. Baertl Hayes is about 15 times that of the sun, and it is a certain distance from the stars that explode into stars. Black holes are 25-30 times larger than the sun, and a type II supernova will be born in the future! In other words, the mass of a nuclear collapse supernova is at least nine times that of the sun.