The document describes the 8 planets in our solar system - Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. It provides key details about each planet, noting Mercury is the smallest, Venus is very hot, Earth is the only known place with life, Mars is nicknamed the Red Planet, Jupiter is the largest, Saturn has elaborate rings, Uranus is the 7th planet, and Neptune is the farthest planet from the Sun.