Why do the stars in the sky change at any time?

There are two kinds of motion phenomena in the change of constellation position in the sky: the first is that the earth rotates from west to east around its own axis, that is, the earth rotates, so that we can see the stars come out from the east, slowly cross the sky, and then fall in the west, just like the sun we see every day. Secondly, because the earth revolves around the sun, each star rises from the horizon about 4 minutes earlier than the previous day, so the position of the constellation gradually moves westward at the same time every night of the year. For example, Orion, 65438+ rises in the east at dusk in early February. Three months later, at dusk, Orion was already shining in the southern sky. In late spring, Orion and the sun set at the same time.

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