Can you tell me something about the spring and summer constellations? Thank you.

On a clear night, you will see the starry sky, which is very beautiful. Careful observation shows that there are many stars whose mutual positions are constant, and the connecting lines between them can form a certain shape-triangle, quadrangle, spoon, human figure, animal shape and so on. In order to understand and study the stars, people divide the starry sky into many regions, which are called constellations.

On a spring night, you can see seven bright stars in the sky forming a spoon. This is the famous Big Dipper. The Big Dipper belongs to the constellation Ursa major, which is an obvious sign for finding Ursa major.

Polaris is always due north. At night, when there is no compass and no other signs to tell the direction, Polaris can be used to tell the direction.

On a summer night, you can see a galaxy crossing the sky. There is a bright star on the east "shore" of the Milky Way, and there is a dark star on each corner. The three stars form a polar shape. This bright star is called Altair.