Across
- 2. magnitude star brightness from earth
- 4. diagrams graph of relationships between stars
- 6. the actual brightness of an object
- 8. magnitude measure of star brightness from standard distance
- 11. space and all the matter and energy in it.
- 12. stars,dust,and gas bound by gravity
Down
- 1. star explosion that throws out its outer layers
- 3. spectrum all frequencies or wavelengths of electromagnetic raiation
- 5. distance light travels in a year
- 7. a region where stars are born
- 9. dwarf hot dim star that used be a sun
- 10. star collapsed star that turns into neutrons