Across
- 1. Speed at which waves travel
- 3. The lowest part of a wave
- 7. Any of the large, self-luminous, heavenly bodies, as the sun
- 8. Range of electromagnetic radiation
- 11. Way to measure a stars distance
- 12. The amount of time light takes to reach Earth
- 13. How many waves per second
- 14. The energy to do work
Down
- 2. Equal to the average distance of Earth from the sun
- 4. A stars brightness
- 5. Distance measured by two points
- 6. Something that has a trough and a crest
- 9. The real luminosity of a star
- 10. The highest part of a wave