Across
- 5. Latin for "cloud"
- 6. the time after sunset or before sunrise
- 7. moon becoming more illuminated
- 9. Greek for "circle of animals"
- 10. a measure of the atmosphere's stability
- 11. a group of people who get together to view the sky
- 12. in an object moves in reverse of "normal"
Down
- 1. point in the sky that's directly overhead
- 2. imaginary north-south line that passes directly overhead
- 3. moon becoming less illuminated
- 4. a star ending it's life in a huge explosion
- 8. The diameter of a telescope’s main lens or mirror