Space

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Across
  1. 1. Earth's "sister" planet
  2. 3. A system of stars, dust, and gas
  3. 6. A region with gravity so strong even light can't escape
  4. 8. Earth's natural satellite
  5. 9. A cloud of gas and dust in space
  6. 10. A space rock burning in Earth's atmosphere
  7. 16. Another word for the universe
  8. 18. Tool used to observe distant space objects
  9. 19. All of space, time, matter, and energy
  10. 20. The path an object takes around another
Down
  1. 2. Worn by astronauts for protection
  2. 4. Orbits a star like the Sun
  3. 5. Has a tail and orbits the Sun
  4. 7. The force that pulls objects together
  5. 11. When one celestial body blocks another
  6. 12. Used to launch objects into space
  7. 13. Known as the Red Planet
  8. 14. Man-made object orbiting Earth
  9. 15. A rocky body orbiting the Sun
  10. 17. The star at the center of our solar system