Pluto, a planet in the solar system, was classified as a dwarf planet and named asteroid 134340 in Resolution No.5 adopted by the 26th International Astronomical Union held in Prague on August 24th, 2006, and was eliminated from the nine planets in the solar system.

So now there are only eight planets in the solar system. That is to say, since August 24th, 2006 1 1, there are only eight planets in the solar system, namely Mercury, Venus, Earth, Mars, Jupiter, Saturn and Uranus. There are eight planets in the solar system. They are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune. Except Mercury and Venus, the other seven planets have their own satellites, which are a celestial system bound by the sun's gravity, including the sun, planets and their satellites, dwarf planets, asteroids, comets and interplanetary matter. The sun is about 260,000 light years away from the Milky Way and 230,000 light years away from the edge.