Briefly tell the story of "Queqiao"

Legend has it that the granddaughter Weaver of the ancient Emperor of Heaven is very good at weaving, weaving rosy clouds for the sky every day. She hated this boring life, so she secretly went down to earth, married a cowherd in Hexi privately, and lived a life of farming and weaving. This angered the Emperor of Heaven, took the Weaver Girl back to heaven, ordered them to separate, and only allowed them to meet at Queqiao once a year on July 7th.

Their faithful love touched magpies, and countless magpies flew in and built a colorful bridge on the Tianhe River with their bodies, so that the cowherd and the Weaver Girl could meet on the Tianhe River.

Extended information Every year on the seventh day of the seventh lunar month, commonly known as "Tanabata", it is said that the Cowherd and the Weaver Girl meet once a year at the "Queqiao". For thousands of years, this ancient and touching love story has been handed down from generation to generation, and this day is also praised by modern people as the China version of Valentine's Day.

Vega In autumn night, the brightest star we see is Vega. In early autumn, around 9 pm, she passed over our heads; Autumn is getting deeper and deeper, and the time for her to cross our heads is getting earlier and earlier. Vega is connected with several nearby stars to form Lyra, which we call Lyra. This is an introduction to the location of Vega, the shape of Lyra and the origin of its name.

Altair is in the east of Vega, as white as a cloud, and it crosses the sky intermittently from north to south. This is the Milky Way, also known as Tianhe. There are three stars in a straight line in the southeast of Tianhe East. The middle is very bright, and the light on both sides is very weak, so it looks exactly the same as the middle distance. Connect these three stars with a straight line, just like a lever with two equal arms.

These three stars are called Libra, also called Shoudan. One of the biggest and brightest is Altair, also known as Altair. His brilliance is a little yellow, not as bright as Vega, but none of the other stars are as bright as him. This is an introduction to the position, brightness and shape of Libra.

Vega, Altair and the sun are all stars. The brightness of Vega is 50 times that of the sun, and the brightness of Altair is more than 10 times that of the sun. Just because it is too far away from us, it looks like two bigger stars. Vega and Altair are both stars and their brilliance.

Vega is 26 light years away from the earth, and Altair is 16 light years away from the earth. It takes only 8 minutes 18 seconds for sunlight to reach the earth from the sun, while it takes 26 years for Vega's light to reach the earth. Introduce the distance between Vega and Altair and the earth.

Vega is approaching the sun at a speed of 14 km per second, and Altair is also moving, approaching the sun at a speed of 33 km per second, which is similar to the revolution speed of the earth-29 km per second. Their movement is not facing the sun, and the direction of movement is gradually changing. So don't worry about them hitting the sun. This is about the movement of Vega and Altair.