Explanation:
There are 8 planets in our solar system. These planets, in order from closest to the Sun to farthest, are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. Previously, Pluto was considered the ninth planet, but it was reclassified as a dwarf planet by the International Astronomical Union (IAU) in 2006. Understanding the number and order of planets helps in studying the structure and dynamics of our solar system, as well as the characteristics and composition of each planet.