Across
- 3. All material confined to the plane of the galaxy?
- 6. An irregularly shaped cluster that contains fewer than 1000 galaxies, many spiral, and no giant ellipticals?
- 7. The effect of the focusing of light from a distant galaxy or quasar by an intervening galaxy to produce multiple images of the distant body?
- 9. A cluster containing more than 1000 galaxies, mostly elliptical, scattered over a volume about 3 in diameter?
- 11. The procedure for finding the mass of a galaxy from its curve?
- 14. A galaxy that is around a bright nucleus?
Down
- 1. Orbital motion in accord with someones laws of planetary motion?
- 2. The spheroidal cloud of stars at the center of most spiral galaxies, including our Milky Way Galaxy?
- 3. Nonluminous material that is detected only by its gravitational influence?
- 4. The part of the galaxy including all matter in a spherical distribution around the center?
- 5. A graph of orbital velocity versus radius in the disk of a galaxy?
- 8. The theory that large galaxies absorb smaller galaxies.
- 10. A bright blue galaxy in which many new stars are forming, thought to be caused by collisions between galaxies?
- 12. A long strand of gas, dust, and stars drawn out of a galaxy interacting gravitationally with another galaxy?
- 13. The spherical region of a spiral galaxy containing a thin scattering of stars, star clusters, and small amounts of gas?