TMH SPACE MIND BUSTER

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Across
  1. 1. The most abundant element in the universe
  2. 5. The red planet
  3. 8. Theoretical passage through space-time
  4. 9. The planet we live on
  5. 10. A huge collection of stars, gas, and dust
  6. 12. The "Ice Giant" farthest from the sun
  7. 14. The explosion of a dying supergiant star
  8. 16. Planet with prominent rings
  9. 17. The second closest planet to the sun
  10. 18. Planet closest to the sun
Down
  1. 2. A large cloud of gas and dust in space where stars are often born
  2. 3. A pattern of stars that makes a shape
  3. 4. The series of missions aimed at landing the first man on the moon
  4. 6. Envelope of gases surrounding a planet
  5. 7. A famous space telescope
  6. 11. The largest planet in the solar system
  7. 13. The seventh planet from the sun
  8. 15. A "rocky" belt between Mars and Jupiter