You can see constellations on summer nights in eastern China.

Take Shanghai as an example. In mid-July, the sun is in Cancer.

In theory, that is, from Leo to Taurus, from the south to about 50 south latitude, nearly two-thirds of the celestial sphere is visible. Obviously, getting a set of enumeration methods will make the answer long and tasteless. Here I briefly introduce the evening sky shortly after sunset.

First of all, the western part of the sky is the starry sky in spring, which is mainly marked by the Da Chun Arc: Beidou (Ursa Major), arcturus (Capricorn), Arcturus VII (Virgo), and finally extends to Furong (Ursa Major). Arcturus and arcturus are two first-class stars, and they form an equilateral triangle with Emperor I (Leo), which is called the Spring Triangle. The spring triangle and cor caroli (Canis Canis) form a diamond, which is collectively called the spring diamond.

In the south of these celestial bodies, Ophiuchus crosses east and west, reaching 135 (more than two thirds of the celestial sphere), making it the largest constellation in the whole day. There are also some small constellations, such as Tmall (northwest of Leo), Little Lion (north of Leo) and Evening Constellation (east of Leo and northwest of Virgo). There are three small constellations between the lion and the long snake, namely sextant, Grand Duke and the crow mentioned above. There are two constellations south of Ophiuchus, Centaur and Wolf of Wealth, but they are not paid much attention to because of their low latitude and height.

In the eastern half of the sky, summer constellations are gradually rising, and the most obvious signs are the Summer Triangle, namely: Altair (Eagle), Vega (Lyra) and Tianjin IV (Swan). Looking west along the Cowherd and the Weaver Girl, you can see a star with good brightness and they form an approximate equilateral triangle, which is the main star of Ophiuchus (it needs to be mentioned that Ophiuchus is the only big constellation that spans the ecliptic, equator and silver road, with many bright stars and many deep-space celestial bodies with connotations, but it is unknown for some reason). There are a bunch of moderately bright but scattered stars in the northwest of Ophiuchus. Looking south along the milky way water in the summer triangle, we can find two big constellations in the south of the sky, Scorpio in the west and Sagittarius in the east. Because they are close to the center of the Milky Way, as long as the conditions are better, you can see the bright Milky Way and a bunch of cluster nebulae.

There are also some small constellations in the sky in summer. Sagittarius and fox are sandwiched between Skyhawk and Lyra, and SHIELD is located in the southwest of Skyhawk. At both ends of Ophiuchus are the head and tail of the serpent, which is the only constellation in the whole day, because in western myths and legends, Ophiuchus and Ophiuchus are good friends, and even if they fight in the sky, they are inseparable ... = = ... Scorpio and Sagittarius are divided into two constellations, but if you can recognize these two constellations, you must be very solid friends on the construction site.

Because the symbolic celestial bodies of the starry sky in spring and summer are far apart, I left some constellations at the end of the spring and summer. From north to south, the first ones are Beiguan (between Mu Fu and Wuxian), Giant Snake (head) (between girl and snake man) and Libra (between girl and Scorpio).

The northern part of the sky is a constant circle, which mainly includes Ursa minor, Draco, Deer Leopard and Cepheus. Cassiopeia and Ursa major can also be included if conditions are broad.

The starry sky in early summer is usually like this, with a little more information, isn't it? Yes, if I explain the starry sky in the suburbs, it will take me at least half an hour. Then we will explain the ancient starry sky system in China ... Rome was not built in a day, and the starry sky can't be recognized in a day. Every sunny night, I will look up at the star map to find my friends in the sky. I rotate all year round, and I feel very relaxed. In retrospect, it was sweet.