Historically, there have been nine planets in the solar system: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune and Pluto. However, in 2006, the International Astronomical Union decided to reclassify Pluto as a dwarf planet, reducing the official number of planets to eight.What are all the planets for kids?
Our Solar System. Here on planets for kids we will explain the planets within Solar System , that there are eight planets that orbit the Sun which are, Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune. These 8 planets can then be separated into two planetary categories, Terrestrial Planet and Gas Giant.Do you know the inner planets?
The inner planets, or terrestrial planets, are the four planets closest to the Sun: Mercury, Venus, Earth, and Mars . Figure below shows the relative sizes of these four inner planets. This composite shows the relative sizes of the four inner planets. From left to right, they are Mercury, Venus, Earth, and Mars.What is the ninth planet?
Clyde Tombaugh 's discovery of Pluto in 1930 appeared to validate Lowell's hypothesis, and Pluto was officially named the ninth planet. In 1978, Pluto was conclusively determined to be too small for its gravity to affect the giant planets, resulting in a brief search for a tenth planet.