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