Beidou satellite constellation _ Beidou satellite constellation function

What constellation does the Big Dipper belong to?

The Big Dipper belongs to Ursa major.

The Big Dipper is a star in Ursa Major, so it is called Ursa Major in astronomy. They belong to Ursa Major, namely Ursa Major α, Ursa Major β, Ursa Major γ, Ursa Major δ, Ursa Major ε, Ursa Major ζ and Ursa Major η, so they are all major stars in Ursa Major.

The Big Dipper is an important constellation in the northern hemisphere sky. The ancients linked these seven stars and imagined them as ancient bucket shapes, hence the name. From the top of the bucket to the end of bucket handle, the Big Dipper is named α, β, γ, δ, ε, ζ and η in turn. In ancient China, they were called Shu Tian, Tian Xuan, Tianqi, Tianquan and η respectively.

About the Big Dipper

In the evening of spring, the Big Dipper bucket handle faces east, in the evening of summer, the Big Dipper bucket handle faces north, in the evening of autumn, the Big Dipper bucket handle faces west, and in the evening of winter, the Big Dipper bucket handle faces south, that is, "bucket handle refers to the east, the world is spring, bucket handle refers to the north, the world is summer, bucket handle refers to the west, the world is autumn and the world is winter".

Shu Tian, Tian Xuan, Tianji and Tian Quan are the four stars that make up the Big Dipper, and the three stars with handles are Yuheng, Kaiyang and Yaoguang respectively. The star in the center of the handle is called "Kaiyang", and there is a fourth-order companion star called "auxiliary star" at the distance of 1 1. Kaiyang and the auxiliary star form an optical binary star, which can be recognized by naked eyes. Kaiyang and auxiliary stars are also the only physical binary stars visible to the naked eye all day.

The above contents refer to Baidu Encyclopedia-Big Dipper.