Alnilam constellation.

Betelgeuse (Orion ε) is located in Orion, which is called Alnilam in the west and Orion 46 in Flemish nomenclature. Betelgeuse is the 30th brightest star in the whole night sky and the 4th brightest star in Orion. It is a blue and white Supergiant star and one of the brightest stars known. If you look at Betelgeuse from the earth, you will find it on Orion's belt.

Betelgeuse is also one of the 57 stars used for astronomical navigation. People living in mid-latitude areas will find Betelgeuse at the highest point in the sky at midnight on February 5, 65438 every year. Because of its relatively simple spectral structure, it is helpful for astronomers to study interstellar matter. In the last few million years, Betelgeuse will become a red Supergiant star, followed by a supernova explosion. The molecular cloud NGC 1990 surrounds Betelgeuse and becomes a reflection nebula because of its brightness. The wind speed of Betelgeuse star may reach 2000 km/s, resulting in its mass loss rate of about 20 million times that of the sun.

The name Alnilam evolved from Arabic, and the words arni Han and arni Tan are also related to Alnilam [1]. These three variants are obviously mistakes in translation or plagiarism. [Editor] The belt of Orion The three stars on the belt of Orion have unique names in many cultures. In Arabic, Al Nijād, Al Nasak and Al Alāt stand for "belt", "column" and "gold grain" respectively, while in modern Arabic, Al mzān Al H akk stands for "scale with accurate scale".

In China culture, Orion is also called the "weighing scale". In China, Betelgeuse belongs to Betelgeuse, one of the 28 stars and the second star. Before Christianity appeared in Scandinavia, Orion's belt was used as a spinning rod in Frigga or freya. The sticks of James and Peter from the Bible are considered as the three wise men of the East. In finnish mythology (according to the epic Ka Laivaara), these three stars represent the sickle of Venamonin and the sword of Karefang respectively.

Ethnic minorities in northern Mexico call these three stars Hap (mule deer), Haamoja (elk) and Mojet (bighorn sheep) respectively, and they are collectively called Hapj (meaning hunter). According to legend, Hamoja in the center was wounded by hunters, and his blood flowed into Tiburon Island in California Bay. It is said that these stars also influenced the construction of the pyramids of Giza in Egypt. Betelgeuse, the fourth star of Betelgeuse in the west, also known as Alpha Orion, is a red Supergiant star in Orion. It is the twelfth brightest star in the night sky except the sun. In the winter night sky, it forms a winter triangle with Sirius in Canis major and Nanhe III in Canis minor. Although it is the alpha star of Orion, the actual beta star of Orion (Betelgeuse) is brighter than it.

Betelgeuse is very interesting in astronomy. This is one of the first stars to measure the diameter with celestial interferometer. Astronomers found that its diameter is uncertain, from the smallest 290,000,000 kilometers to the largest 480,000,000 kilometers, which is larger than Jupiter's orbit around the sun.

Astronomers predict that Betelgeuse will eventually end up with a type II supernova explosion, or its mass is only enough to become a white dwarf. But there is no consensus on how long it can live: some people think that the constant change of its diameter means that Betelgeuse is merging its carbon atoms and will become a supernova in thousands of years; People who disagree with this view think it can exist for a longer time. If a supernova really happens, its luminosity will increase to more than 1000 times, which is about the luminosity of a chord month. Some predictions show that the maximum luminosity can even be as bright as the full moon (minus 65,438+02.5, etc. ). The light of a supernova will last for several months, and it can be seen during the day, then it will gradually dim and disappear into the night sky, and it will be invisible to the naked eye. Orion's arm will disappear and become a nebula in a few centuries. However, if the spin axis of this neutron star faces the earth, it will be more troublesome. The high-energy gamma rays and cosmic particles released by it will reach the earth like rain, weaken the ozone layer, and aurora will appear in many skies. Betelgeuse is the seventh star of Betelgeuse (also known as Betelgeuse, Betelgeuse), located in Orion. Although it is called beta star, it is brighter than Betelgeuse alpha star, with an apparent magnitude of 0. 18, making it the seventh brightest star in the night sky except the sun.

Betelgeuse is about 700 to 900 light years away from the Earth, and its spectral type belongs to B8. It is inferred that it is a Supergiant star, and its luminosity is 40,000 times that of the sun. Toilet I, also known as "Alpha Star in Celestial Rabbit" and "Aneb", is the brightest star in Celestial Rabbit. It belongs to Betelgeuse among the star officials in China.

This star is dying. It may have undergone the evolution of Supergiant star, or it is evolving into Supergiant star. Because its mass is less than 10 suns, it will evolve into a hot white dwarf. But if its mass is greater than expected, it has a chance to explode as a supernova and end its life. The shit star is located in Cepheus, which is the μ star of Cepheus in Bayer nomenclature. In China, it belongs to Betelgeuse, which represents the excrement in the toilet of the star official.

The spectral type of shit star belongs to O type, which is a blue dwarf star with an apparent magnitude of 5. 15, etc. It is one of the few O-type stars visible to the naked eye, 300 light-years away from the solar system 1. It is located at 05h 45m 59.9s right ascension and-32 declination18' 23 ". The absolute magnitude is -2.84, etc. The rotation period of shit stars is only 1.5 days, which is equivalent to the rotation speed of the same type of stars.

Shit star is a famous runaway star, and its rotation speed is very fast. It and Auriga AE star escape from each other at a speed of 100 km per second. The starting point of escape is Orion ι, one of the trapezoidal quartets in the middle of Orion Nebula. The reason for mutual escape is thought to be the collision of two binary systems 2.5 million years ago.