101 Facts... Solar System

101 Facts... Solar System’ a fun and fascinating way for young readers to discover more about the planets, dwarf planets and other fascinating objects in the Solar System. There is even has an accompanying webpage with video clips giving a visual insight into the Solar System. Fascinating Facts Include... More than 619,000 minor planets have been discovered in the Solar System. The Sun accounts for more than 99% of the mass of the Solar System. Earth is the densest planet in the Solar System. It also spins faster than any other planet.