Across
- 6. Graph of orbital velocity versus radius in the disk of a galaxy
- 7. Contains most of the galaxy's stars and nearly all of its gas and dust
- 9. Invisible matter in space that contains gravity
- 11. Galaxy with arms that curve and loop around
- 12. a cloud of gas collapsing gravitionally to become a galaxy
Down
- 1. Flattened Cloud of billions of stars
- 2. Galaxy with no certain shape
- 3. Huge Collection of stars, solar systems, gas, and dust all held together by gravity
- 4. Large space cloud of gas and dust
- 5. Halo and central bulge together
- 8. Galaxy that is usually round or ovular
- 10. Spherical cloud of stars and star clusters that contain almost no gas and no dust