Which star is the brightest in the sky to the west of constellation knowledge?

People who often pay attention to the sky will find a bright star in the west, which usually appears at dusk or dawn. Very dazzling. Do you know what that bright star is? Then let the constellation knowledge reveal the secret for everyone! Let's take a look at the relevant astronomical knowledge.

What is the brightest star in the western sky: Venus The brightest star in the western sky in the evening is Venus.

Venus, one of the eight planets in the solar system, is the second planet in the distance sequence from the sun, with a distance of 0.725 astronomical unit. It is the closest planet to the earth (Mars is sometimes closer). The ancient Romans called it Venus, China called it Chang Geng, Qi Ming, Taibai or Taibai Venus, and Aphrodite in ancient Greek mythology. Period of revolution is 224.7438+0 Earth Day. The brightness in the night sky is second only to the moon, and Venus will reach its maximum brightness before sunrise or after sunset. It appears in the eastern sky in the morning and is called "Qi Ming". Dusk is in the west of the sky, called Chang Gung.

Extended data Venus rotates in the same direction as Uranus, contrary to other planets, from east to west. Therefore, on Venus, the sun rises in the west and sets in the east. Venus' orbit around the sun is an ellipse that is very close to a perfect circle, and the deviation is less than 1, which is close to the ecliptic plane. Its revolution speed is about 35 kilometers per second, and that of period of revolution is about 224.70 days. But its rotation period is 243 days, which means that Venus' rotation sidereal day is getting longer every day.

However, according to the earth's standards, if a sunrise is counted as a day, the year on Venus is far less than 243 days. This is 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.

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