Across
- 5. What is the biggest star called?
- 6. How long it takes to complete one rotation
- 7. The unit used to measure the distance in space
- 9. What are millions of small,rocky objects called?
- 10. The planets closest to the Sun are called what?
Down
- 1. What is a spherical object that orbits the sun?
- 2. When a planets atmosphere traps in energy and causes the temperature to rise
- 3. How long it takes to complete one revolution
- 4. Earth,Venus,Mercury,and Mars are classified as what?
- 8. What is made of gas,dust, and ice?