1. What is a huge ball of very hot gases in space?

2. The star at the center of our solar system

3. To spin on an axis

4. A star and all the planets and other objects that revolve around it

5. An imaginary line that passes through Earth's center and its North and South poles

6. A pattern of stars, named after mythological or religious figure, an object, or an animal

7. The path one body takes in space as it revolves around another

8. The bending of light as it moves from one material to another

9. Why are the outer planets cold and dark?

10. How does the Sun appear to move in the sky?