How many planets circle the sun? What holds our solar system together? What planet has the shortest year? What is the hottest planet in our solar system? Why is there life on Earth? Why are there footprints on the moon? Are there volcanoes on Mars? How wide is the asteroid belt? What is the biggest planet in our solar system? How did Saturn get its rings? Which planet used to be named George? What planet has a cloud named Scooter? What are dwarf planets? Are there glowing snowballs in space? Are there other planets beyond our solar system?
