Across
- 1. spectograraphs see and detect light
- 3. an explosion in space
- 5. is a large cloud of gas and dust
- 6. all of space and everything in it
- 8. dworf when a blue star cools down
- 9. first stage of a stars development
- 10. decide
- 11. the brightness of a star if is was stranded
- 12. the universe formed in an instance
Down
- 2. brightness seen from earth
- 4. group of single stars
- 7. the distance that light travels in one year