Across
- 2. a thin, elongated region of stars and interstellar gas that extends into space from a galaxy.
- 3. a form of matter that does not interact with light or other electromagnetic radiation.
- 4. are metal rich,containing 2 to 3 percent metals.
- 5. is a flattened cloud of billions of stars.
- 7. a cluster that contains over a thousand galaxies.
- 8. are metal poor, typically containing less than 0.1 percent metals.
- 10. is 1000 parsecs.
- 13. contain a disk and spiral arms
- 14. are methods or techniques used in Physics and Astronomy to measure the distance between celestial objects.
- 15. 1 million parsecs.
Down
- 1. It refers to the process in which a large galaxy, through tidal gravitational interactions with a companion, merges with that companion.
- 6. vast cloud of gas that by contraction and condensation becomes a galaxy of stars.
- 9. are a chaotic mis of gas, dust , and stars with no obvious nuclear bulge or spiral arms.
- 11. An Object used to map spiral arms.
- 12. is refered to as the disk of the Galaxy.