What constellation is Orion?

Orion is one of the zodiac signs and a concept of astronomy. The observation and research on it began very early. The main body of the constellation consists of four bright stars, Betelgeuse and Betelgeuse, forming a quadrilateral. Orion is also one of the most magnificent constellations among the 88 constellations in the whole day, with an area of 594 square degrees, ranking 26th. Orion, which is so far away from mankind, is composed of many stars and plays a mysterious role in the long history of mankind.

The brightest star in Orion is beta star, with an apparent magnitude of 0. 12, ranking seventh among all bright stars in the whole day, with an absolute magnitude of -7. 1 and a surface temperature of 12000. Alpha Orion, the ninth brightest star in the whole day, Latin for Betelgeuse, with a brightness of 0.06-0.75 and a period of 5.5 years, is an irregular variable star. Every year 1 the end of February, at 8: 00 pm, the three stars of Orion are high in the southern sky, so there is a folk saying that "the three stars are shining high and the New Year is coming".

Orion is outside the solar system where humans live. Orion is made up of stars in several different galaxies, which is an area on the celestial sphere in the center of the earth, but it looks just together in the sky. In Orion, all the stars visible to the naked eye are located in the Milky Way, and the distance between them is very far. At present, the stars that make up Orion are basically members of the Milky Way, the Orion Nebula, or m42.

Orion's explanation

Orion is the most dazzling constellation among the 88 constellations and has the reputation of "the king of constellations". Many people know Orion for the first time, which is the first choice for astronomy lovers. For the northern hemisphere, Orion is a winter constellation, and the best observation date is from early February to early April of 65438+. It rises from the southeast when it appears, and falls from the southwest after crossing the zenith.

Looking up on a cold winter night, it is easy to find the neat rows of Betelgeuse I-III south of the zenith. Around this "Orion belt", there are four bright stars in four directions, which are roughly equal in distance, that is, the shoulders and legs of hunters. If conditions are good, you can also see the head of Orion, the sword, stick and shield in your hand, and even the legendary Orion nebula.

Reference to the above content: Baidu Encyclopedia-Orion