Xinhua News Agency, Tianjin, August 12 (Reporter Zhou Runjian) "Watch Bixiao tonight on Chinese Valentine’s Day, and the Morning Cow and Weaver Girl Cross the River Bridge." August 14 will usher in the romantic Qixi Festival, and it is also said that the Cowherd and the Weaver Girl meet on the bridge once a year. The day of the meeting.

So, how do you find this "couple" who is more loyal than Jin Jian in the night sky?

  According to Xiu Lipeng, director of the Tianjin Astronomical Society and an astronomical science expert, after August, if the weather is fine, people only need to avoid the interference of strong lights. Right-angled triangle, this is the famous "Summer Triangle".

The three protagonists that make up the Great Triangle are Vega in Lyra, Altair in Aquila, and Tianjin IV in Cygnus.

  Vega is the right-angled apex of the "Summer Triangle". Its visual magnitude is 0 degree. It is the brightest star in the constellation Lyra and the fifth brightest star in the sky, second only to Arcturus, and is called " Queen of Summer Night".

Due to the high latitude of Vega, it is visible in most months of the year.

In the area north of 51°N latitude, Vega will never fall, becoming an arc pole star.

The high-hanging zenith and the dazzling Vega is very eye-catching, and the ancients have long been given time based on the view of changes in its position.

If the surrounding environment is dark enough, you can also see 4 stars arranged in a diamond shape around it.

In ancient Chinese mythology, this is the shuttle of the Weaver Girl weaving.

  The southernmost apex of the "Summer Triangle" is Altair, which faces Vega across the Milky Way.

Although the story of the Cowherd and the Weaver Girl is very moving, this name has never appeared in the ancient orthodox astronomical history books. Its official name is "Hegu Er".

There is a small star on each side of Altair, namely "Heguyi" and "Hegusan". According to legend, they are the sons and daughters of Cowherd and Weaver Girl. These 3 stars are arranged in a straight line. The folks also call them "Polestar". ".

  The other apex of the "Summer Triangle" is Tianjin IV. It is a very recognizable star that forms a beautiful big cross with the 4 stars around it, called the "Northern Cross".

Cygnus is like a swan flying high, almost completely immersed in the Milky Way.

On the tail of the swan, it is this beautiful gem, Tianjin IV, which is also the first-magnitude star known to be the farthest from the earth.

  "As long as the weather is fine, you can easily find these 3 bright stars by looking up. Even the dazzling neon lights in the city can't hide their light. Under good observation conditions, you can also see the horizontal in this big triangle. The brilliant galaxy passing by." Xiu Lipeng said.

  In the sky area of ​​the "Summer Triangle", there is also a beautiful "ring", which is the beautiful M57 (NGC6720) Lyra Ring Nebula.

  "In an astronomical telescope, M57 is a beautiful elliptical halo. The inner edge of the halo is light green, the outer edge is red, and the middle part between the two edges is light yellow, like a finely crafted ring. Maybe, This is the most beautiful gift given by Cowherd to Weaver Girl every time Magpie Bridge meets." said Wang Junfeng, a senior astrophotography enthusiast in Beijing.

  The distance between Altair and Vega is actually relatively constant, and the Qixi Festival is no exception. The distance between each other will not be minimized this night.

In the following three months, if the weather is clear, people can find both in the night sky.

  "During this period, the interested public may wish to look up at the sky, listen to the'whispers' of the Cowherd and the Weaver Girl under the bright starry sky, and feel the infinite beauty of the magnificent starry sky." Xiu Lipeng said.

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