Knowledge about the moon

The topography of the moon is (lunar land) (lunar ocean)

Solar system: A celestial system centered on the sun, including (planets) and (satellites) and (small celestial bodies) revolving around the sun (including asteroids, meteors and comets).

Constellation is an arrangement image of some (adjacent) and (able to arrange in a certain regular shape) stars in the sky.

Use the Big Dipper to find the North Star: extend the connection line between the two stars at the front of the Big Dipper spoon to about 5 times the distance between the two stars. There is a brighter star, the Polaris. Polaris belongs to the constellation (Ursa minor). When making the model of the Big Dipper, the length of the thin wire hanging from the seven holes is different (the distance from the Big Dipper to the earth is different).