What constellation does Altair refer to?

Altair is an obvious star in the night sky in summer and autumn. Although it is not as bright as Vega, which is always mentioned, it is also a star belonging to the twelfth bright star. The position of Altair in the night sky actually belongs to a constellation, which is very large and can be said to be a constellation group, which is full of Altair.

What constellation does Altair refer to?

Altair refers to Aquila. According to our archaeological findings, Altair was discovered in the Han Dynasty. Altair, also known as Hegu II, and several other stars form a constellation commonly known as the eagle. Altair I is the alpha constellation of the eagle. The names and divisions of constellations were introduced from the west. The ancient Greeks imagined it as a goshawk flying in the night sky, with Altair as the heart and Altair as the pole. It is the twelfth bright star in the whole day, white. In starry sky observation, it is a corner of the summer triangle. Its connection with beta and gamma stars of Aquila points to Vega, which is far from Vega.

The volume of Altair

In terms of volume, Altair is actually a star larger than the sun. The diameter is about .26, the radius is 1.7 times that of the sun, and it is 16.7 light years away from the earth (one light year is about 10 trillion kilometers). That is to say, the light emitted by the Altair we see now is the light emitted by the Altair 16.7 years ago, and the Altair is a star relatively close to the earth. Vega is 26.4 light years away. Astronomers use triangulation, and the distance between Altair and Vega is about 16 light years.

The legend of Altair

There is a legend between the Cowherd and the Weaver Girl. It is said that after the Queen Mother took the Weaver Girl away, the Cowherd carried the child on a pole and struggled to catch up with the Weaver Girl. Unfortunately, the cruel queen mother tore off the golden hairpin on her head and welcomed the sky with one move. In an instant, a Tianhe fell from the sky, which almost separated the two lovers forever. Legend has it that their experience touched God, and they were allowed to meet once a year on the seventh day of July. Every day, all the magpies in the world come to the edge of the Milky Way and build a magpie bridge for the couple to cross the river. In ancient times, it was generally said that the seventh day of the seventh lunar month was the day when cowherd and weaver girl met.

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