National Space Day (May 2)

1234567891011121314151617181920212223
Across
  1. 1. A massive system of stars, like the Milky Way
  2. 4. Earth's natural satellite
  3. 6. Another word for the universe
  4. 10. Massive balls of burning gas in space
  5. 11. The name of our galaxy
  6. 12. Earth is one
  7. 16. A vehicle that launches into space
  8. 17. A celestial body with a tail of gas and dust
  9. 18. U.S. space agency
  10. 20. Worn by astronauts for protection
  11. 21. A device or moon orbiting a planet
  12. 22. NASA’s famous moon mission program
  13. 23. First name of the first man on the Moon
Down
  1. 2. A person trained to travel in space
  2. 3. All space and everything in it
  3. 5. The path an object takes around another
  4. 7. Related to the sun
  5. 8. Second planet from the sun
  6. 9. A region with gravity so strong, not even light escapes
  7. 13. Tool to observe distant space objects
  8. 14. Force that keeps us grounded
  9. 15. Known as the Red Planet
  10. 19. What rockets do from a pad