Across
- 2. Brightness of a star.
- 3. How bright a star appears.
- 6. The rate at which peaks of a wave pass by a point.
- 7. A W___. - Has a trough and a crest.
- 9. Top of a wave.
- 10. Apparent Shift, in position of nearby star.
- 12. The star that is in the middle of our galaxy.
- 13. Bottom of a wave.
Down
- 1. Complete spectrum of light.
- 4. How hot or cold something is.
- 5. The planet we live on.
- 7. The length/distance between waves.
- 8. Speed of a wave.
- 11. Distance of light travel in one year.