Across
- 2. a large group of stars
- 4. a unit of length
- 6. ___ arms- wings that spread from the center of the galaxy
- 7. ___ Bang Theory- a theory that states that the universe began as a small point
- 9. bands of dust that appear as dark ribbons
- 12. ___ Radiation- radiation consisting of electric and magnetic waves
- 14. ___ Waves- waves with longer wavelengths than visible light
- 16. an instrument that collects light
- 18. all space and the matter space contains
- 19. provide us with visible light spectrum
- 21. electromagnetic ___- vast arrangement of electromagnetic waves
Down
- 1. the transfer of energy through matter or space
- 3. a self-luminous celestial body of a mass of gas
- 5. electromagnetic waves that are between radio waves and infrared waves
- 8. the distance between any two corresponding points
- 10. how fast light travels
- 11. ___ waves- waves with long wavelengths and low frequencies
- 13. a beginning point
- 15. a large cloud of dust
- 17. ___ mass-a standard unit to compare the size of other stars
- 20. the death of a large star
- 22. ___ Way Galaxy- the huge grouping of stars that rotate around the center