Solar System

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