Across
- 3. the blue planet
- 4. light travels from the sun to earth in 8 ______
- 6. farthest planet in the solar system
- 7. our galaxy
- 8. Mercury has a surface covered with _______
Down
- 1. giant star
- 2. smallest planet in the solar system
- 4. earth only natural satellite
- 5. largest planet in the solar system
- 7. the red planet