Space Crossword

1. One of the different apparent shapes of the moon as seen from Earth
7. The tide with the greatest difference between consecutive low and high tides
8. A large round pit caused by the impact of a meteoroid
10. The blocking of sunlight to the moon that occurs when Earth is directly between the sun and the moon
11. The tide with the least difference between consecutive low and high tides
13. An object that orbits a planet
15. A loose collection of ice and dust the orbits the sun, typically in a long, narrow orbit
19. The scientific law that states every object in the universe attracts every other object
21. A chunk of rock or dust in space, generally smaller than an asteroid
23. The part of a shadow surrounding the darkest part
25. An object the orbits a star, is large enough to have become rounded by its own gravity, and has cleared the area of its orbit
26. An imaginary line that passes through a planet's center and its north and south poles, about which the planet rotates
27. Either of the two days of the year on which neither hemisphere is tilted toward or away from the sun

2. Either of the two days of the year on which the sun reaches its greatest distance north or south of the equator
3. A pattern or grouping of stars that people imagine to represent a figure or object
4. The spinning motion of a planet on its axis
5. A ball of gas, primarily hydrogen and helium, that undergoes nuclear fusion
6. The attractive force between objects; the force that moves objects downhill
9. The movement of an object around another object
12. The darkest part of a shadow
14. The periodic rise and fall of the level of water in the ocean
16. A streak of light in the sky produced by the burning of a meteoroid in Earth's atmosphere
17. A system of organizing time that defines the beginning, length, and divisions of a year
18. The blocking of sunlight to Earth that occurs when the moon is directly between the sun and Earth
20. The participial or total blocking of one object in space by another
22. The path of an object as it revolves around another object in space
24. Dark, flat areas on the moon's surface formed from huge ancient lava flows