Across
- 2. a place in space where gravity pulls so much that even light can not get out
- 3. most well known constellation
- 6. relating to the world or the universe
- 8. what is our solar system
- 10. how many astronauts have walked on the moon
- 11. coldest planet in our solar system
- 12. the planet is closest in size to Earth
Down
- 1. tubular optical instrument for viewing space
- 4. which planet has the fastest rotation?
- 5. electromagnetic radiation of the shortest wavelength and highest energy
- 7. sixth planet from the Sun
- 9. a band of small celestial bodies beyond the orbit of Neptune from which many short-period comets are believed to originate