Solar System Introduction
The Solar System (Solar System) is a mass-massed sun that maintains the celestial system around the surrounding planets, satellites, asteroids, and comets with its huge gravity.
The sun is located about 27,000 light-years away from the center of the Milky Way (the center of the silver) and 23,000 light-years away from the edge. The Milky Way is about 100,000 light-years in diameter and contains 150 billion stars. The Sun is just one of them. The sun moves around the galaxy at a speed of 250 kilometers per second, orbiting for about 250 million years, and the earth ’s climate and the entire natural world also undergo periodic changes of 250 million years.
The solar system includes the sun, 8 planets, 67 satellites, and at least 500,000 asteroids, as well as dwarf planets and a small number of comets. If Neptune is used as the boundary of the solar system, the diameter of the solar system is 60 astronomical units, which is about 9 billion kilometers. If the orbit of a comet is included, the diameter of the solar system can reach 60-80,000 astronomical units, or 0.9-1.2 trillion kilometers.