Across
- 3. Can be seen by the naked eye.
- 4. A spectrum of electromagnetic radiation emitted through a substance
- 6. 3rd shortest wavelength, 3rd highest frequency.
- 7. Longest wavelength, lowest frequency.
- 12. Graph in which the absolute magnitudes of stars are plotted against their spectral types
- 14. The magnitude of a celestial object as would be seen from 10 parsecs
- 16. A star with ssubstantiatelarger radius and luminosity than a main-sequence star
- 17. The most massive and luminous stars
- 18. 3rd longest wavelength, 3rd lowest frequency.
Down
- 1. The range of wavelengths or frequencies
- 2. A spectrum of electromagnetic radiation emitted by a source
- 5. 2nd shortest wavelength, 2nd highest frequency.
- 8. A classification of stars which appear on plots as a continuous band.
- 9. 9.4607 x 10 12 km
- 10. The magnitude of a celestial object as measured from Earth
- 11. Small, very dense stars
- 13. Shortest wavelength, highest frequency.
- 15. An emission spectrum that consists of a continuum of wavelengths.