Question

Medal and fan if you can help me out.
1. Astronomers' ever-expanding knowlage of the universe has coinsided with the development of _____, a collection of indirect distance measurment techniques.
a. the cosmic distance scale
b. the cosmic microwave background
c. light echo distance
d. differential galactic rotation

Answer 1

2. What exactly is expanding in the universe?
a. distances separating the galaxy clusters
b. distances separating the planets in our solar system
c. individual galaxy and galaxy clusters
d. atoms, rocks and planets

3. Protogalactic clouds that have large amounts of angular momentum develop into _____ galaxies.
a. spiral
b. irregular
c. elliptical
d. irregular spiral

4. _____ is used to determine distance between galaxies.
a. Hubble’s law
b. Newton’s theory of relativity
c. The cosmological redshift
d. Euclidean geometry

5. The _____ of the galaxy prove(s) that the cosmos is not steady and unchanging.
a. velocity
b. Doppler shift
c. gravitational rotation
d. recessional motions

6. Elliptical galaxies have no
a. spiral arms
b. central nucleus
c. stellar density
d. interstellar gas

7. The Milky Way is an example of that kind of galaxy?
a. barred-spiral
b. spiral
c. elliptical
d S0

8. _____ galaxies are charactoriezed by a long stretch of stars that extends out beyond the galactic disk.
a. Elliptical
b. Barred-spiral
c. Irregular
d. Spiral

9. Astonomers are able to measure changes in the rate of universe expansion by observing which of the following?
a. distance nebulae
b. black holes
c. distant supernovae
d. cosmic microwave background

10. Which formation theory suggests that galaxies formed when massive Protogalactic clouds fragmented into smaller gas clouds that then formed into individual galaxies?
a. bottom-up
b. top-down
c. lambda dark matter
d. galaxy collision