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Screams,and any sound that we make,are w...View Answer
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A) 100 light-years
B) 1,000 light-years
C) 10,000 light-years
D) 100,000 light-years
E) 1,000,000 light-years
G) D) and E)
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A) 23,000 years
B) 230,000 years
C) 2.3 million years
D) 230 million years
E) 23 billion years
G) C) and D)
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A) open clusters
B) O and B stars
C) globular clusters
D) gas and dust
E) all of the above
G) A) and C)
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A) It should be higher in mass.
B) It should have a higher fraction of elements heavier than hydrogen and helium.
C) It should be much brighter.
D) It should orbit the galactic center at a much higher rate of speed.
E) All of the above would be expected.
G) None of the above
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A) It produces so much visible light that it is opaque and blocks our view of anything beyond it.
B) It reflects most light from far distances of the galaxy away from our line of sight.
C) It absorbs all wavelengths of light.
D) It absorbs visible,ultraviolet,and some infrared light.
E) all of the above
G) A) and C)
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