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