Across
- 4. a system of stars, gas, and dust
- 6. our gallaxy
- 8. brightness
- 11. the impact of a forces
- 12. it shows the range of electromagnetic radiation
- 13. blank arms
- 14. round-like shape
Down
- 1. the hotness or coldness of something
- 2. a hole of nothingness
- 3. the cycle of a star
- 5. the main part of an hr diagram
- 7. bunch of stars with no pattern
- 8. a distance light travels in a year
- 9. the idea of the universe
- 10. when objects to appear to shift toward the red