Sort Planets Into Types

Our solar system contains eight official planets, which astronomers classify into two main categories based on their composition and characteristics. Terrestrial planets - Mercury, Venus, Earth, and Mars - Are rocky, dense, and relatively small, with solid surfaces. Gas giants - Jupiter and Saturn - Are enormous planets composed primarily of hydrogen and helium, with no solid surface. Ice giants - Uranus and Neptune - Are composed mainly of water, ammonia, and methane ices beneath thick gaseous atmospheres. Understanding these planetary types is fundamental to planetary science and astronomy. In this sortable quiz, you'll classify each planet by type. Test your solar system knowledge and see if you can sort all eight planets correctly.