_______________ galaxies have star formation, but no clear shape.
Correct Answer:
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Q45: The mass of a galaxy's central black
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
Q51: Galactic collisions _.
A) are very rare, since
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
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