Across
- 5. all of space and everything in it
- 7. the system consisting of the sun and the planets and other objects revolve around it
- 8. has a central bulge and spiral arms around the center
- 10. have no defined shape or structure
Down
- 1. oval shaped and the have stars consistently throughout
- 2. an object that orbits a planet
- 3. the distance that light travels in one year
- 4. a star system with two stars
- 6. a ball of hot gas that undergoes nuclear fusion
- 9. a huge group of single stars, star systems, star clusters, dust, and gas bound together by gravity