1. What is the planet closest to the sun?
2. Who was the first to discover Mercury?
3. What is the sixth planet from the sun?
4. What is the second planet from the sun?
5. What is Venus the goddess of?
6. What is the average temperature on Venus?
7. What is Saturn the god of?
8. How thick are Saturn's rings?
9. What makes Uranus blue?
10 What is Uranus the god of?