Across
- 4. Planets that revolve around the sun.
- 6. What keeps us orbiting the sun
- 8. Saturn rings' _________ is ice and rocks
- 9. Theoretical type of exoplanet with an icy surface of volatiles such as water, ammonia, and methane
Down
- 1. What separates the inner and outer planets A celestial body moving in an elliptical orbit around a star
- 2. Believed to be at least 10 billion light-years in diameter and contains a vast number of galaxies
- 3. Jupiter
- 5. The outside part or uppermost layer of something
- 7. The envelope of gases surrounding the earth or another planet