Astronomy

1. A cycle of changes the moons appearance undergoes
3. One of Jupiter's moons that may hold liquid water
5. Causes the perceived rising and setting of the sun
6. A constellation in the northern sky, also called Ursa Major
9. The periodic change in sea level due to the moon and the sun
10. A group of stars forming a recognizable pattern
12. This occurs when a portion of the Earth is engulfed in a shadow cast by the Moon which fully or partially blocks sunlight
13. A unit of length used to express astronomical distances and measures

2. The path the sun, moon, and planets take across the sky as seen from Earth
4. A natural light display in the Earth's sky, predominantly seen in the high-latitude regions
7. A star that is almost directly above the North Pole
8. Galaxy that contains our solar system
11. The apparent change in the suns position in the sky