Across
- 4. a rotating disk of dust
- 6. group of stars
- 8. stars that are close together
- 9. a galaxy that is not spiral or elliptical
- 10. study the univers
- 11. a red coler star
- 13. method to measurement that are close to earth
Down
- 1. a lot of stars tightly together
- 2. all of the star sesutom an galixy gas an dust
- 3. big group of stars up to hundred thousand
- 4. arm that spiral outward
- 5. group of stars
- 6. egg shape galaxy
- 7. are galaxy
- 12. a ball of hot gas