We should expect galaxies to collide fairly often because
A) they are large with respect to their separation distances.
B) galaxies contain large amounts of neutral hydrogen.
C) galaxies occur in clusters.
D) they are large with respect to their separation distances and galaxies occur in clusters.
E) None of the other choices are correct.
Correct Answer:
Verified
Q1: The rotation curve of a galaxy can
Q3: Gravitational lensing
A)occurs when light passes near a
Q4: _ can be used to determine the
Q5: _ have elongated nuclei with spiral structure
Q6: The look-back time is
A)the time it takes
Q7: Mathematical models indicate that _ galaxies are
Q8: The total mass of galaxies in a
Q9: Poor clusters
A)contain more than 1000 stars and
Q10: A _ generally contains well over 1000
Q11: Most of the mass of a galaxy
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