Earth, Sun, and Moon

2. Half lit on the left side, dark on the right.
6. Light starting on the right; only a little sliver of the moon is visible from Earth.
7. March 20th or 21st in the Northern Hemisphere, when both hemispheres receive 12 hours of daylight and 12 hours of darkness.
10. Occurs when the New Moon passes directly between the Sun and Earth and casts a shadow over part of Earth.
12. Sources of illumination in a solar system.
13. Occurs when the path of light on an object is blocked by another object either between the light source and the object or between the object and the observer.
14. The slant of Earth's axis, 23.5 degrees, causing the North Pole to always point toward the North Star. The reason for the seasons.
16. A predictable pattern of reflected light from the Sun on the Moon, as seen on Earth.
17. Moon is starting to get darker. It is slightly dark on the right side, mostly lit on the left.
18. The spinning of Earth on its axis.
22. A curved path followed by a satellite as it revolves around an object.
23. Lit crescent on the left side, dark on the right.
25. Direct light in the Northern Hemisphere, warmest season.
26. Moon phase when the entire side facing Earth is illuminated, the phase in which a lunar eclipse could occur.
28. The outer layer of the sun's atmosphere.
29. Almost all of the moon is lit up from the right to the left, except a small bit on the left.

1. Caused by the tilt of Earth on its axis as it revolves around the Sun causing varied amounts of sunlight on Earth; divides our year into quarters.
3. The day with the least hours of sunlight and the most hours of darkness. December 21st.
4. A force of attraction between objects that is due to their masses.
5. The day with the most hours of sunlight and the fewest hours of darkness. June 21st.
8. Half lit on the right side, dark on the left.
9. Indirect light in the Northern Hemisphere, coldest season.
11. The imaginary line through Earth that extends from the North Pole to the South Pole and is the center of Earth's rotation.
15. All of the solar systems and every object they contain.
19. September 22 in the Northern Hemisphere, when both hemispheres receive 12 hours of daylight and 12 hours of darkness.
20. Star made of hydrogen and helium
21. Occurs at a full moon when Earth is directly between the moon and the sun.
24. Dark moon phase that occurs when the Moon is between Earth and the Sun. When a solar eclipse could happen.
27. A celestial body that revolves around a planet.