Astronomy Vocab

2. The tide with the least difference between consecutive low and high tides
5. The movement of an object around another object
7. A basalt plain on the moon that appears darker
8. Either of the two days of the year on which the sun reaches its greatest distance north or south of the equator
10. Either of the two days of the year on which neither hemisphere is tilted toward or away from the sun
13. When the moon moves into Earth's shadow
17. A model of the universe with Earth in the center
19. The spinning motion of a planet on its axis
20. The tide with the greatest difference between consecutive low and high tides

1. The lunar hemisphere that always faces away from Earth
3. The tendency of an object to resist a change in motion
4. When the moon is directly between the sun and Earth, blocking the view of the sun from Earth
6. An object that orbits a planet
9. Another word for moon
11. A model of the solar system with the planets revolving around the sun
12. The part of a shadow surrounding the darkest part
14. The darkest part of a shadow
15. The moon between new and full moon, when the lit area increases
16. The moon between full and new moon, when the lit area decreases
18. A large bowl-shaped depression formed by a meteorite