On the east and west sides of Betelgeuse, there are two roughly symmetrical bright stars (1), a red star in the east (1) is called Betelgeuse, and a blue star in the west (1) is called Betelgeuse. The surface temperature of Betelgeuse is about 12000, and its radius is about 50 times that of the sun, which is very huge, but it can only be regarded as a dwarf compared with Betelgeuse. The temperature of Betelgeuse is only 3000, but its radius is at least 700 times that of the sun and at most 1000 times, so it should be called a superstar. Betelgeuse shrinks and expands irregularly.
In the southwest of Betelgeuse, there are three smaller stars winking at you. This is Xiao Samsung. Please observe these three little stars carefully on a clear moonless night (without binoculars). You will find that the star in the middle is different from the ordinary star. It doesn't have a sharp outline, but it is like a fog spot, and fuzzy light permeates all around. This is the famous Orion nebula. Orion is the name of a brave hunter. In the ancient star map, we can see a burly Orion with a stick and a shield in his hand; With a sword hanging around his waist, he is welcoming the fierce Taurus from the north.
Extending the connection of Betelgeuse to the north by about 8 times, I met an orange star, 1, which is the fifth star of Taurus. Bi Suwu constitutes the right eye of Taurus. Near Bi Suwu, a dozen dim stars and Bi Suwu together form a V-shape, which is the famous Bi Xingqun, which is one of the 28 ancient places in China. Not far from Bixing Cluster, six or seven mixed stars form another cluster, named Pleiades Cluster, also called Six-Star Seven Sisters Cluster. People with good eyesight can see nine stars.
Please note that all the stars in the Pleiades are blue and white. In the cold days of winter, the Pleiades cluster emits cold light near our heads, which is even more chilling. Some people say that the cold in winter is released by these stars. Do you believe it or not?
Looking east from Taurus, two first-class bright stars are affectionately attached side by side, which set each other off. A particularly bright 1 star in the south is called Beihe III, and the one in the north is a second-class star, called Beihe II. According to Greek mythology, Borax (Latin name of Behe III) and Caster (Behe II) are twins born by Zeus and the goddess Rita, hence the name Gemini.
There is Auriga in the north of Taurus, and its leader is Capella, a second-class star. There are several small stars in the southwest of Capella. They form a slender triangle. They are reliable references to Capella.
Extending from the lead of Orion Betelgeuse to the southeast for about seven times, you will meet the brightest star in the whole day, which is called Sirius. Blue light is reminiscent of a wolf's eyes shining in the dark, hence its name. Sirius is the brightest star in the sky. The only brighter stars are Venus (called the evening star and the morning star) and Jupiter, and Mars is sometimes brighter than it.
Sirius belongs to Canis Canis, and correspondingly, there is a small dog in the south of Gemini. Canis canis really small. Besides the coach, 1, there are other stars who burn the midnight oil, Nanhe, and only the third-class stars, 1, are waving flags and shouting. According to Greek mythology, big dogs and small dogs are hounds following Orion.
In addition, the constellations that can be seen in the winter sky are Bojiang, Celestial, Tian Ge, Tail and Sailfish. But these constellations are obscure and dim, so let's take a look.
The starry sky is like a book, which is often displayed in front of us. Whoever knows how to read it can gain infinite knowledge from it.