I see a bright star in the eastern night sky. What star is that?

A bright star seen in the eastern night sky is the morning star, which is what we call Venus.

Venus is one of the eight planets in the solar system, ranking second in the order from near to far from the sun. In ancient China, it was also called Chang Geng, Qi Ming or Taibai. Period of revolution is Earth Day 224.75438+0. In the night sky, the brightness is second only to the moon, and Venus will not reach its maximum brightness until before sunrise or after sunset.

Venus is a terrestrial planet, sometimes called the "sister star" of the earth, and the only planet in the solar system without a magnetic field. Among the eight planets, Venus's orbit is the closest to a circle, and its minimum eccentricity is only 0.7%.

When the vertex of the Earth's angle connects Venus and the sun respectively, we will find that this angle is very small, even if the maximum is only 48.5, because Venus's orbit is inside the Earth's orbit. So when we see Venus, it is either in the morning or at night, on the east and west sides of the sky respectively.

Venus, like the moon, has periodic phase changes (phase changes), but it is too far away from the earth to be seen by the naked eye. The phase transition of Venus was once used by Galileo as strong evidence to prove Copernicus Heliocentrism.

If we have a bird's eye view of the solar system from the north pole of the sun, all the planets rotate counterclockwise, but Venus rotates clockwise and Venus rotates counterclockwise.