What constellation does Cowherd and Weaver Girl belong to?

The official name of Altair in China is Heguji; It and several other stars form a constellation called Aquila. The official name of Vega in China is Vega I; It and several other stars form a constellation called Lyra.

On the east bank of the Milky Way, far away from Vega, there is a bright star slightly darker than her, which is the alpha star of Altair and Aquila. The ancient Greeks imagined it as an eagle flying in the night sky, and Altair was the heart of the eagle. Also known as Hegu II in China, he is a big star. It forms a constellation with several other stars, commonly known as the eagle constellation.

Vega, the scientific name Lyra, is a star far away from Altair and close to the earth, and it is also one of the brightest stars near the sun. It belongs to Lyra and is also a bright star of Lyra. It is one of the most famous bright stars in the summer night sky, so in the west, people also call her "the queen of summer night".

Little is known about Altair and Vega

There are three kinds of Altair, whose astronomical names are Hegu I, Hegu II and Hegu III. The so-called Altair is Hegu II. There are also three Vega, whose astronomical names are Vega I, Vega II and Vega III. Vega is usually called Vega i. Vega 1 is an independent star, but Vega 2 is composed of four stars, and Vega 3 is composed of two stars, but it is too far away from the earth, so Vega 2 and Vega 3 are just a star point visible to the naked eye on the earth.

Compared with Vega and Altair, the sun is not big at all. The radius of Altair is 1.68 times that of the sun, and the radius of Vega is 3.2 times that of the sun. Vega and Altair both rotate much faster than the sun, so their shapes are flat.

The above contents refer to Baidu Encyclopedia-Altair Baidu Encyclopedia-Vega.