Across
- 3. the universe exploded
- 6. the brightness they really are
- 10. contracting cloud of gas and dust with mass to form a star
Down
- 1. large cloud of gas and dust
- 2. all of space and everything in it
- 4. a group of single stars and other objects bound by gravity
- 5. dwarf blue white core that gets left behind
- 7. distance that light travels in one year
- 8. the brightness seen from earth
- 9. the explosion when a star blazes