𝘿𝙖𝙨 𝙎𝙤𝙣𝙣𝙚𝙣𝙨𝙮𝙨𝙩𝙚𝙢
The solar system is our cosmic home. Our earth is just one of nine large planets that orbit the sun on circular ellipses. Arranged according to their mean distance from the sun, they are: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune and Pluto. With the exception of Mercury and Venus, they are accompanied by one or more moons on their orbits. Thousands of minor planets or planetoids orbit our sun, mainly between the orbits of Mars and Jupiter. The planetoids are lumps of rock without an atmosphere, with diameters ranging from a few tens of kilometers to 1000 kilometers. Unlike the large planets, they are not always spherical. Despite their large number, their total mass is probably less than the mass of our moon. Comets are also part of our solar system. They orbit the sun in highly elliptical orbits. The Sun, which is the center of our solar system and contains over 99.9% of the total mass of the solar system, is just one star among billions of stars in our Milky Way. The Milky Way does not rest either, but rotates around its center. The sun with the entire solar system takes part in this movement and needs about 240 million years at a speed of 220 kilometers per second for one orbit. The entire universe consists of many billions of such Milky Ways (galaxies), which are also not in fixed places. They move away from each other. Source: text information board