History of the Universe

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  • Topic: Milky Way, Star, Interstellar medium
  • Pages : 2 (340 words )
  • Download(s) : 598
  • Published : April 17, 2012
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1) Shapley's three-dimensional view of the distribution of globular star clusters is represented by a sphere centered on galactic center.
A)True
B)False

2) Shapley concluded that the Solar System couldn't be located at the center of the galaxy. He observed :
A) an even distribution of globular clusters in all directions. B) more globular clusters in certain directions.
C) an uneven, random scattering of globular clusters across the sky.

3) Since the stars inside the horse's head in the Hubble Space Telescope image are considerably fainter and redder than the bright stars surrounding the horse's head in the ground-based image, what would you conclude?

A) The stars inside the horse's head are less luminous than the surrounding stars.
B) Interstellar dust is blocking some of the visible starlight coming from the stars inside the horse's head.
C) Interstellar gas is blocking some of the visible starlight coming from the stars inside the horse's head.
D) There are fewer stars behind the horse's head.

4) Abundant star formation is taking place in the halo of the Milky Way Galaxy.
A) True
B) False

5) The Sun is located at the center of the Milky Way Galaxy. A) True
B) False

6) Shapley overestimated the dimensions of the Milky Way Galaxy because he failed to account for interstellar extinction by dust. A) True
B) False

7) The Herschels attempted to determine the galaxy's structure by looking for dust clouds with their telescope.
A) locating galactic center.
B) systematically counting stars in each direction.
C) observing globular star clusters.
D) finding the distances to the spiral arms.

8) Shapley was able to determine the distance to a globular star cluster by identifying and studying each cluster's
A) Population I stars.
B) RR Lyrae stars.
C) eclipsing binary stars.
D) spectroscopic binary stars.
E) gas and dust.

9) Modern representations of the galaxy place Population II stars A) only at galactic center.
B) only in the...
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