Across
- 3. space and all matter and energy in it
- 5. the actual brightness of an object
- 7. All of the frequencies or wavelength
- 8. a region were stars are born
- 11. the brightness of a star as seen from earth
- 12. a small hot dim star
Down
- 1. a measure of how bright a star would be
- 2. a star that has collapsed under gravity
- 4. a gigantic explosion
- 6. the distance that light travels in a year
- 9. a Hertzsprung Russell diagram
- 10. a collection of star,dust and gas bound together by gravity