Across
- 2. a death of a large star caused by an explosion 10. waves with very high energy
- 5. change in wavelength
- 8. how fast light travels
- 9. distance between two waves
- 11. large cloud of gas
- 14. large group of stars in outer space
- 15. visible light
Down
- 1. they are used in medical applications
- 3. all space
- 4. electronic waves
- 5. transfers energy through matter of waves
- 6. a big star that planets revolve around
- 7. stars that spread out
- 8. a representation of an object
- 10. very high energy and charge
- 12. waves waves with longer wavelengths
- 13. a mass of gas held together