Spiral structures and steady star formation depend on ____.
A) gentle gravitational interactions with other galaxies
B) galactic cannibalism
C) major collisions with other galaxies
D) hot intergalactic gas flow
E) supermassive central black holes
Correct Answer:
Verified
Q48: S0 galaxies have spiral arms, but little
Q49: Because the Hubble constant has a value
Q50: _ galaxies have star formation, but no
Q51: Galactic collisions _.
A) are very rare, since
Q52: Galactic _ describes the process of a
Q54: Gravitational lensing is caused by _.
A) refraction
Q55: _ are objects of known luminosity used
Q56: The _ time is the amount of
Q57: The Milky Way and other spiral galaxies
Q58: Because the Hubble constant has a value
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