Across
- 2. large cloud of gas
- 4. bands of dust that appear as dark ribbons against bright stars
- 9. the universe began as a small point and expanded rapidly
- 12. information taken from experimnets
- 14. large group of stars in space
- 16. the death of a large star by explosion
- 20. the distance that light travels through space in a year
- 21. a galaxy that does not fit into any category
Down
- 1. instrument that collects light
- 3. the transfer of energy
- 5. all space and matter space contains
- 6. beginning which something begins
- 7. stars that spread out from the center of a spiral galaxy
- 8. rotational center of a huge galaxy
- 10. provide us with the colors we see
- 11. waves between radio and infrared waves
- 13. electromagnetic waves with longer wavelenghts than visible light
- 15. self lumnious body of gas
- 17. light travels at 300,000km/sec
- 18. a representation of an object
- 19. a ball only 10 km across and strong gravity
- 22. standard unit to compare the size of stars with our Sun