Across
- 1. a group of single stars
- 5. distance that light travels in one year
- 7. stars brightness if it was standard distance from earth
- 8. blue-white core that is left behind and cools
- 9. universe formed in a instant
- 10. a large cloud of gas and dust
- 11. the star gets brighter then explodes
Down
- 2. brightness seen from earth
- 3. a cloud of gas and dust with enough mass to form a star
- 4. more accurate scale of the entire solar system
- 6. all space and everything inside of it