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