Across
- 4. Scientist who first realized satellites can be launched into space
- 6. The point on the sky directly below your feet
- 7. milkyway is this type of galaxy
- 8. Nation that launched first artificial satellite
- 9. when energy from blackhole outshines the surrounding galaxy
- 11. stars that never rise or set
- 12. type of rock that gives moon its characteristic light color and is of low density
- 13. this mission detected water on Moon
- 15. first space station (albeit temporary)
- 16. first space probe to take close up images of a comet
- 18. satellites are launched using
- 19. Maximum number of astronauts ISS can hold
Down
- 1. when a satellite has same period of orbit as Earth's rotation
- 2. CEO of Mars One
- 3. the motion in which mars moved that proved geocentric theory wrong
- 5. evolution of stars diagram
- 8. size of star can be determined by this law
- 10. Zero g airplane
- 14. time of the day when waning crescent moon is highest in the sky
- 17. Astronauts of this mission were the first to escape Earth's gravity