Solar system planets. Our solar system is an orderly arrangement of planets orbiting the Sun. NASA. Pluto, a dwarf planet, was classified as one of the solar system planets when it was first discovered by Clyde Tombaugh. read more
When many of us grew up, there were nine planets in the Solar System. It was like a fixed point in our brains. As kids, memorizing this list was an early right of passage of nerd pride: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune and Pluto. read more
In our Solar System, there are 4 rocky planets (Mercury, Venus, Earth, Mars), 4 gas Giants (Jupiter, Saturn, Uranus, Neptune). In the trans-Neptunian zone, there are possibly several hundred dwarf planets, out of which 5 (Pluto, Ceres, Haumea, Makemake, Eris) are currently recognized by the International Astronomical Union. read more