Venus, which is the closest planet to the earth (sometimes Mars is closer). It appeared in the eastern sky in the morning under the name of "Qi Ming"; Evening is called Chang Geng, which is in the west of the sky. It reaches its maximum brightness before sunrise or after sunset, second only to the moon in the night sky.
Mars was called "fluorescent star" in ancient China, because it was red and fluorescent like fire. Its brightness often changes, reaching -2.9, which is only darker than Venus, the moon and the sun, but it is darker than Jupiter most of the time. And it often moves in the sky at dusk, sometimes from west to east, sometimes from east to west. The situation is complicated and confusing, so China called it "Yingying" in ancient times.
Extended data:
Because Venus rotates in the opposite direction; On Venus, the sunrise is in the west and the sunset is in the east. The alternation of day and night from one sunrise to the next is only 1 16.75 days on earth. Venus and the sun have a maximum viewing angle of no more than 48 on the earth, so Venus will not appear in the night sky all night. In our country, people call Venus at dawn the morning star and Venus at dusk the evening star.
In addition to this unusual retrograde, Venus is a little unusual. Venus' rotation period and orbit are synchronized, so that when the two planets are closest, Venus always faces the earth with the same face (once every 5.00438+0 Venus days).