Across
- 4. ambient light reflecting only a small portion
- 7. lighter surface areas with many craters
- 9. formed by lava action, darker areas
- 11. moon phases approaching a full moon
- 12. orbital point farthest from Earth
- 14. orbital point closest to Earth
- 16. the moon blocks the light from the sun
- 18. fully concentrated portion of eclipse shadow
Down
- 1. ambient light reflecting most, but not all
- 2. NASA's program between mercury and apollo
- 3. partial concentration of eclipse shadow
- 4. evidence of collision impact
- 5. national aeronautics space administration
- 6. attractive force between 2 masses
- 8. physical effect of moon's gravity on the oceans
- 10. an object's tendency to remain in motion
- 13. an elliptical path maintained by inertia & gravity
- 15. NASA space program, phase 1
- 17. 3rd phase of NASA space program