Different seasons and different constellations.

It appeared in Orion. It was in the south around 8 pm in February, but it appeared near the western horizon at the same time in May. In contrast, Orion, which appears at the same time, moves 90 degrees from south to west in three months and moves westward about once a day.

The same is true of the Big Dipper and the constellation Hou Xian, which can be seen in the northern sky. As shown on the right, the position of the Big Dipper seen at the same time was east of Polaris in March, and it moved to a higher position than Polaris in June. Its angle around Polaris moves about 30 degrees every month, and it is still about 1 degree every day.

The planet moves from east to west and will return to its original position in a day. However, to be correct, it should be moved to the west once a day. So the constellations visible at the same time have slightly different positions in spring, summer, autumn and winter.

Of course, the positions of constellations will be different at different times. After the sun has completely set, the stars appear, and the constellation you see at this time is called the seasonal constellation.

Orion will appear in the evening of 1 February,1month and February, so it is called the winter constellation. Scorpio is common in July and August, so it is called the constellation of summer.

Since the planets move 30 degrees a month and 360 degrees a year, you can see the same constellation at the same time after one year.