Across
- 4. gave the helio-centric model
- 5. law that predicts the temperature of the sun
- 6. material to build space elevator; stronger than kevlar
- 7. age of the universe
- 9. space telescope in optical range
- 10. prize designed for encouraging space tourism
- 14. discovered Uranus
- 15. place where most comets exist
- 16. Newton's book that suggests space travel
Down
- 1. very energetic stellar explosion
- 2. Telstar is the first ....... satellite to be in orbit
- 3. first space probe to escape sun's gravity
- 8. 11.2 m/s
- 11. soviet space station
- 12. space telescope in X-ray range
- 13. number of humans that set foot on other world (moon)