Can you see the stars in the sky this season? When is the difference?

The brightest planet in the sky is Venus.

Venus is one of the eight planets in the solar system, and it is the second planet in the order from near to far from the sun. It is the closest planet to the earth. (Mars is sometimes closer) China called it Chang Gung, Qi Ming, Taibai or Taibai Venus in ancient times. 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 sometimes appears in the eastern sky in the morning and is called "Qi Ming". Evening is in the west of the sky.

Venus is a planet similar to the earth. Because its mass is similar to that of the earth, it is sometimes called the "sister star" of the earth, and it is also the only planet in the solar system without a magnetic field. Among the eight planets, Venus's orbit is closest to a circle, and its eccentricity is the smallest, only 0.7%.

Take the earth as a vertex of a triangle and connect Venus and the sun respectively. You will find that this angle is very small, because Venus's orbit is in the orbit of the earth. So when we see Venus, it is either in the morning or at night, on the east and west sides of the sky respectively.

Sirius, the brightest star in the whole day.

Looking from Orion to the southeast, one of the brightest stars in the whole day shines there. It is Alpha Canis, also known as Sirius in ancient China. Sirius's apparent magnitude is-1.45 m, which is only 8.7 light years away from us. Sirius is the brightest star in Canis Canis. In ancient Egypt, people respected it, because once it appeared in the east before dawn, it meant the flood of the Nile, which was the most horrible day of the year. Now we know that it has a companion star, and it also hides unknown secrets. The Greek poet Aeschylus called Sirius a "fire dog" because the brightest star in Canis major appeared in the sky before dawn in July and August, and these months happened to be the hottest months of the year. Seen from the ground, Sirius is the brightest star in the whole sky after relaying the sun. One of the reasons is that this star is close to us. For example, the brightest star in Cygnus is located in Sirius, so we will see that its brightness will be 3000 times that of now. The ancients did not know the brightness of Sirius, nor did they know that it was so bright because it was close to the earth. However, they still put this planet in an extremely important position in their own cosmology. In the 8th century BC, the Babylonians recorded Sirius in cuneiform characters carved on clay tablets. They say this star is bronzed, it appears in the winter night sky, and it is very bright even during the day. The ancient Egyptians called this star Sotheby's, which means "the star on the water". Every year in late July, they are eager to watch the stars rise before dawn, which appears at the moment before sunrise. In fact, it was from this time that the Nile ushered in its precious flood period, irrigating the land of Egypt and making it fertile soil.

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