At the same time, Orion moves westward a little every day. For example, in February, Orion is due south at 8 pm, and in March, Orion is due south at 7 pm. On the contrary, in June, 5438+ 10, it will not be due south until 9 pm. Because all the stars rise in the east and set in the west every day, just like the sun, which is caused by the rotation of the earth.