Across
- 5. object that orbits a bigger object
- 8. most basic unit of time
- 10. splits light in a spectrum
- 15. V2____missile
- 18. orbit, satellite stays above same point of earth
- 20. level of detail
- 21. away from earth
Down
- 1. Russian astronaut
- 2. satellites that relay phone calls
- 3. orbit, Hohmann
- 4. rocket motor
- 6. sun-______
- 7. satellite, Hubble space telescope
- 9. used to slow satellite to change orbit
- 11. rocket engines
- 12. chinese astronaut
- 13. dog on Sputnik 2
- 14. equal night
- 16. time taken to complete an orbit
- 17. near earth
- 19. orbit, travels perpendicular to equator