Across
- 2. the explosion resulting in the formation and expansion of the universe
- 5. accurate scale of the entire solar system
- 8. Brilliant explosion of a dying supergiant star
- 12. brightness as seen from Earth
Down
- 1. distance that light travels in one year
- 3. dwarf Blue white core that is left behind cools
- 4. brightness the star would have if it were at a standard distance from earth
- 6. a group of single stars
- 7. A contracting cloud of gas and dust with enough mass to form a star
- 9. all of space and everything in it
- 10. Large cloud of gas and dust containing an immense volume of material
- 11. Large telescopes have spectrographs