You can see the twelve constellations in the sky in winter.

Although it is very cold in winter, the starry sky is extremely magnificent. The constellations you can see are: (1) Orion is the center of the winter sky. At the latitude of Xiamen, after nightfall, you can see three bright stars arranged neatly. They are the ones who say that "Samsung shines high". There are four bright stars around Samsung that form a rectangle with Samsung. This is Orion. Samsung is Orion's belt. Samsung's connection extends to the lower left. You can see the brightest star in the whole day: Sirius. It is the main star of Canis Canis. Extending from Samsung to the upper right is the bright red star Bi Su Wu. Next to it is Capella. Taurus is Gemini in the southeast, Cancer in the east and lion head in the east. To the southwest of Orion is a long, big but very dim wave constellation. The main star of the Water Resources Commission, only in Guangdong, I vaguely saw Orion as a rabbit in the south. South is the main star of carina. Below Orion's Samsung, there is a bright spot, which is the Orion Nebula. Next to the leftmost part of Samsung is the Horsehead Nebula. The Pleiades cluster in Taurus is an excellent open cluster, consisting of about 500 stars. Center position: 5: 30 right ascension, 5 degrees declination. Between Taurus, Gemini, puppy, big dog and other constellations, the north is within the Milky Way. There are 2 stars with magnitude 1, 5 stars with magnitude 2, and there are many dark stars in the constellation. Alpha star (Betelgeuse) is a famous variable star and red Supergiant star, and beta star (Betelgeuse) is a blue-and-white 0-magnitude star, which is also the Supergiant star. δ, ε and ζ (mintaka, II, I) are listed in a straight line. Form the belt of Orion. Vail II is a four-star surrounded by the famous large nebula M42. Orion is the most recognizable constellation in the winter sky. You see, the four stars α, γ, β and κ in the constellation form a quadrilateral, and the three stars δ and ζ form a straight line at its center. These are the seven brightest stars in Orion, among which α and β are 1m, and the rest are 2m stars. There are so many bright stars in a constellation, and they are arranged so regularly and magnificently. No wonder, all over the world, it is a symbol of strength, fortitude and success, and people always compare it to gods, warriors, superman and heroes. The brightest star in Orion is alpha star, which is the sixth brightest star in the whole day. Orion β is the eighth bright star in the whole day. Every year 1 the end of February, at 8: 00 pm, the three stars of Orion are high in the southern sky, so there is a folk saying that "the three stars are shining high and the New Year is coming". Orion's most famous celestial body is the Big Nebula. It is located in the south of Samsung, with an apparent magnitude of 4 m, and looks like a white fog, which is very easy to identify. There is also a nebula near Orion zeta. There are no stars nearby to illuminate it, and no one provides it with ultraviolet rays to make it shine. It just blocks the light of the nebula, so we can see its horsehead-shaped outline. Therefore, this nebula, also known as the Horsehead Nebula, is a typical dark nebula. Orion also has a meteor shower, which is located at the point where the connecting line between ζ star and α star doubles northward. Its appearance date is 65438+1October 2 1 every year, and its peak period is 65438+1October 2 1. It was also caused by Halley's comet. (3)- Cancer center location: 8: 00 right ascension, 10 minute, 20 degrees declination. Gemini East, Leo West. There are four brighter stars in the constellation, and there is an open cluster M44 (Ghost Cluster). The fourth house of Cancer Palace. The longitude of the Yellow River varies from 90 degrees to 120 degrees. It originally came from Cancer, hence its name. Every year around June 22nd, the sun comes to this palace. At this time, the solar term is the summer solstice, so the summer point is also called "the first point of Cancer Palace". Cancer is in the west of Leo, and the snake head is in the north. This is the darkest of the zodiac signs. The brightest star in the constellation is only 3.8m, so you can't see the shape of a crab at all. This may be because it was smashed into pieces by a stick of Hercules. That's right, it still clings to the long snake and goes along with it! Near the central star of Cancer (or between the two bright stars of Xuanyuan XIV and Gemini), people with good eyesight can see a small white fog, which turned out to be a cluster, which is called "honeycomb cluster" in astronomy. This cluster has more than 200 members and is 520 light years away. In astronomy, star clusters are divided into two categories, one is the "globular cluster" in Ursa major, and the other is the honeycomb cluster, which is called the "open cluster". These clusters are irregular in shape and generally distributed on silver plates. Astronomers have discovered more than 1000 open clusters in the Milky Way. They estimate that the number of open clusters in the whole galaxy must exceed 10000. (4)- Gemini center position: 7 o'clock right ascension, 10 minute, 24 degrees declination. Between Taurus and Cancer. The two brightest stars, α and β, stand out. α (Beihe II) is a secondary star, and β (Beihe III) is a 1 star. The open cluster M35 is visible to the naked eye. There are 19 stars brighter than 4 in the constellation. Double uterus, third house. The longitude of the yellow meridian ranges from 60 degrees to 90 degrees. Every year the sun comes to this palace around 2 1, when the solar terms are full. Gemini is the last of the twelve constellations. Extending the line between Orion and Orion to the northeast, you can meet two bright stars that are not far apart. The brighter Gemini has a brightness of 1. 14 m, and the darker Gemini has a brightness of1.97mm. A series of stars from this star is almost parallel to another series of stars from this star. They are imagined as two loving brothers.