Galactic collisions ____.
A) are very rare, since few galaxies are in clusters
B) will cause stars in each galaxy to collide and trigger supernova events
C) often trigger bursts of star formation
D) only happen in poor clusters
E) usually break large galaxy into several small ones
Correct Answer:
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Q46: One of the rare galaxies that is
Q47: A galaxy with randomly oriented elongated star
Q48: S0 galaxies have spiral arms, but little
Q49: Because the Hubble constant has a value
Q50: _ galaxies have star formation, but no
Q52: Galactic _ describes the process of a
Q53: Spiral structures and steady star formation depend
Q54: Gravitational lensing is caused by _.
A) refraction
Q55: _ are objects of known luminosity used
Q56: The _ time is the amount of
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