Let's Go Out of this World  
What is the largest object in our solar system?
What is an orbit?
How many planets are in the solar system?
What planet do we live on?
Which planets do not have oxygen for you to breathe?
What is the sun made out of?
What is the only planet that has not been visited by a spacecraft?
 What is a planet?
What are two important things that the sun gives us?
What must a planet have in order for life to be present?
Why is the Earth the best place for you to land your spaceship?