Who can teach me how to identify the stars and constellations in the sky?

First buy a book about constellations, such as Constellations and Greek Myths and Constellation World, and combine myths and legends to deepen the memory of constellations (whether you don't remember the twelve constellations when sailing). When you have an impression in your mind, you should get a set of active star maps and an actual observation binoculars (less than 8 times), because it is not difficult to remember the main bright stars of dozens of constellations alone, the key is that they are dense that day.

In this case, you'd better remember some tricks, you can find the famous bright stars in each constellation, or you can first determine some obvious goals and extend around them. But only if you are proficient in the positional relationship between constellations and have a good sense of direction.

For example, look for Orion in winter (this can be recognized at a glance), and then extend Betelgeuse to the southeast to find the brightest Sirius, thus locating Canis major; Extending northwest to the Pleiades cluster, thus locating Taurus (or according to Bisef); Based on Betelgeuse and Sirius, Nanhesan was found in the winter triangle, thus locating Canis minor. Orion locates Gemini in the northeast (or according to the North River binary star); Locate the Bojiang Tower in the southwest (or according to the Water Conservancy Commission I); Positioning auriga in the north (or according to Capella); Taurus is Perseus in the north; Canis major is Leo in the East. In this way, the famous constellations in winter are linked on a picture, and the starry sky in spring, summer and autumn can also do the same. In spring, you can find the Big Dipper or the big triangle in spring, or radiate around with Virgo and Leo as the center. In summer, you can find the Summer Triangle, or Scorpio and Sagittarius. In autumn, you can use Cassiopeia or "Pegasus-Fairy Box" for positioning.