Across
- 3. star blazes millions times brighter
- 9. its brightness from earth
- 10. find out
- 11. to look at
- 12. large cloud of gas and dust containing an immense volume of material
Down
- 1. distance that light travels in one year
- 2. all of space and everything in it
- 4. the brightness the star would have if at a standard distance from earth
- 5. cloud of gas and dust with enough mass to form a star
- 6. universe was formed in an instant in an explosion
- 7. a group of single stars, star systems, star clusters, dust,and gas bound together by gravity
- 8. blue-white core that is left behind and cools