Space Race

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Across
  1. 2. The path that an object takes in space when it goes around a star, a planet, or a moon
  2. 4. The seventh planet from the sun
  3. 8. Small, rocky objects that orbit the Sun
  4. 10. The big space rock that orbits the Earth
  5. 12. The third-most-massive planet & the densest giant planet
  6. 15. The science of space
  7. 16. The green and blue planet
  8. 17. Also known as Earth's twin planet
Down
  1. 1. The closet planet to the Sun
  2. 3. The biggest planet in the solar system
  3. 5. A dwarf planet
  4. 6. The force of attraction between two objects with mass
  5. 7. The ringed planet
  6. 9. Shines bright in our solar system
  7. 11. A solid object from a comet, asteroid, or meteoroid, that comes from outer space to crash on a planet or moon
  8. 13. Named after the Roman god of war
  9. 14. Cosmic snowballs of frozen gases, rock, and dust that orbit the Sun