The average distance of Mercury's revolution around the sun is 57.909.050 kilometers. Because its eccentricity reaches 0.205, which is the highest among the eight planets, its distance from the sun varies greatly. When it is at perihelion, it is only 46.00 1.200 km away from the sun. At apohelion, it is 69.438+06.900 kilometers away from the sun.
According to the data of the detector, the average temperature of Mercury facing the sun exceeds 400 degrees Celsius, which is extremely rare among many planets in the solar system. But it is also the distance between mercury and the sun that keeps mercury from being swallowed up by the sun. From this point of view, all planets in a star system must keep a certain distance from their main stars, otherwise it is difficult to protect themselves. The distance between Yang and Mercury is far from other distances.
Mercury characteristics
Mercury was called Mercury in ancient Europe because of its rapid movement. In ancient Roman mythology, it was the meaning of the messenger god running at full speed. China was called Chen Xing in ancient times, which was recorded in the history books of the Western Han Dynasty? Sima Qian, the author of Tian Guan Shu, found that Chen Xing was gray from practical observation, which was related to the theory of five elements. Black belongs to water and is named Mercury.
Mercury is the smallest of the eight planets in the solar system and the closest planet to the sun. The orbital period is 87.969 1 day, and it meets the earth once every 6 days, and its revolution speed is much faster than other planets in the solar system. Mercury is the planet with the largest temperature difference between day and night, and its atmosphere is extremely thin, so it cannot effectively store heat. The temperature in the equatorial region can reach 437℃ during the day and drop to-172℃ at night. Mercury's axis inclination is the smallest of all planets in the solar system (about 1? 30 degrees), but it has the largest track eccentricity.
The above contents refer to Baidu Encyclopedia-Mercury.