The document describes the eight planets in our Solar System - Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. It provides 2-3 key facts about each planet, such as Mercury being the closest planet to the Sun, Venus sometimes being called Earth's sister planet, Earth being the only planet that supports life, and Neptune being the farthest and coldest planet from the Sun. It concludes by stating the Solar System has eight planets that orbit our enormous star, the Sun.