1) Jupiter is larger than Mars. Mars is colder than Earth. The Moon is smaller than Earth. Saturn is closer to the Sun than Neptune.
2) Mercury is the closest planet to the Sun. Venus is hotter than Uranus. The Sun is the hottest star in the Solar System. Pluto is the farthest planet from the Sun.
3) The document provides information about planets in our solar system and their comparative sizes and distances, and teaches about forming comparatives and superlatives in English.