Across
- 5. luminous celestial body around which the earth
- 6. mass-used in astronomy as a standard unit
- 9. large grouping of stars in space
- 11. galaxy that does not fit into any category
- 13. model-a representation of an object that is accurate
Down
- 1. space and matter space contains
- 2. lanes-bands of dust that appear as dark ribbons
- 3. self luminous celestial body consisting of a mass and gas
- 4. cloud of gas and dust
- 7. of light- how fast light travels
- 8. arms-areas of stars that spread out
- 10. hole-an object with more than four solar masses
- 12. death of a large star by explosion