Term
The part of the Milky Way we are most familiar with is the:
A) Galactic Disk.
B) Halo.
C) Corona.
D) Galactic Bulge.
E) Galactic Center. |
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Term
Most of the new star formation in the Milky Way Galaxy is found in the
A) globular clusters
B) bulge
C) halo
D) spiral arms
E) galactic center |
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Term
Detailed measurements of the disk and central bulge region of our galaxy suggest that our Milky Way is a(n)
A) active galaxy
B) dusty irregular galaxy
C) Seyfert galaxy
D) very flat elliptical galaxy
E) barred spiral galaxy |
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It was the distribution of ________ that showed Harlow Shapley we were no where near the center of the Milky Way in the 1920s.
A) globular clusters
B) planetary nebulae
C) emission nebulae
D) supernova remnants
E) open clusters |
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For what type of object is the period-luminosity relation used for determining distances?
A) RR Lyrae variables
B) Planetary nebulae
C) Cepheids
D) Cataclysmic variables
E) T Tauri variables |
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What observation of the Galaxy suggests it is much larger than the halo and contains a large amount of matter not in the form of stars?
A) tidal streams in the halo
B) the shape of the spiral arms
C) infrared observations of the center of the Galaxy
D) the rotation curve
E) motions of the globular clusters |
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Which of the following is not typical of the Galaxy's spiral arms?
A) emission nebulae
B) giant molecular clouds
C) OB associations
D) globular clusters
E) young star clusters |
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Term
An intermediately wound barred spiral galaxy would, in Hubble's system, be:
A) S2B.
B) SBb.
C) SIrr.
D) BS2.
E) BSE.5. |
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Term
The greatest variation in size and mass occurs in which type of galaxy?
A) SB
B) Irr I
C) E
D) Irr II
E) Sc |
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Term
Most galaxies in the Local Group are:
A) larger spirals than either the Milky Way or M-31 in Andromeda.
B) brown dwarfs, with even more dust than our own Galaxy.
C) dwarf spirals.
D) small irregulars similar to the Magellanic Clouds.
E) dwarf ellipticals, similar to the companions of M-31. |
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Term
Which of the following paraphrases Hubble Law?
A) The greater the distance to a galaxy, the greater its redshift.
B) The greater the distance to a galaxy, the fainter it is.
C) The older the galaxy appears to us, the more luminous it is.
D) The more distant a galaxy is, the younger it appears.
E) The faster the galaxy spins, the more massive and luminous it is. |
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Term
In active galaxies, the central engines may be temporarily fed by
A) a close encounter with a neighbor galaxy.
B) a sudden surge of star formation.
C) a series of supernovae around the core.
D) the sudden collapse of the core into a supermassive black hole.
E) the fusion of helium into carbon in their cores. |
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Term
The most elongated of the elliptical galaxies are Hubble's class:
A) SE5.
B) E7.
C) SBE9.
D) F2.
E) E9. |
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Definition
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The Magellanic Clouds are:
A) small irregular galaxies that move in orbit around our Milky Way.
B) the brightest H II regions in the sky, with active star formation.
C) spiral nebulae originally described by William Herschel.
D) the nearest of the globular star clusters.
E) dust clouds in the southern Milky Way near the Southern Cross. |
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