Across
- 2. A disturbance that travel through space
- 4. Measure distance of near stars
- 6. Speed of a wave
- 7. Unit use to measure the temperature of a star
- 8. Inverse sq. law use to measure the distance of
- 9. The range of wavelength or frequencies
- 11. Power out put of a star
- 12. Wave per second
Down
- 1. The highest point in the wavelength
- 3. Mesure a star brightness by an observer on Earth
- 5. What instrument do we use to find the apparent brightness of a star
- 6. The distance of the wave
- 10. The lowest point in the wavelength
- 11. Unit to measure distance of a star