Across
- 3. ___ arms- spread out from the middle of a galaxy
- 6. _____ theory-says the universe began at a small point 13.7 billion years ago
- 8. radiation consisting of electric and magnetic waves
- 9. bands of dust- look like dark ribbons
- 12. the death of a large star
- 13. ___ waves- waves with longer wavelengths than light
- 15. between radio waves and infrared waves
- 18. gives us the light spectrum
- 19. transfer of energy through matter/space
- 20. ___ data info obtained from experiments
- 21. used to look at far away stars and planets
Down
- 1. unit used to compare the size of other stars to the sun
- 2. long wavelengths and short frequencies
- 3. a representation of an object that is in proportion with it
- 4. unit equal to the distance that light travels in one year
- 5. ____-gravity so strong not even light can escape
- 7. A large group of stars in space
- 8. arrangement of waves in relation to their wave lengths
- 10. center of our solar system
- 11. ____ of light-travels at 300,000km per second
- 14. Large cloud of gas a dust
- 16. the distance between to adjacent points on a wave
- 17. All space and its matter
- 22. where something begins or where it derives