Any asymmetry in the gravity field of a spiral galaxy can induce spiral structure.
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Q3: Dark matter consists of material that emits
Q4: Dark matter is distributed inside galaxies in
Q5: Star formation in spiral galaxies happens only
Q6: We classify galaxies by
A) their true shapes.
B)
Q9: Stars in elliptical galaxies have velocities that
A)
Q10: Galaxies that are classified as quasars were
Q10: We can determine the 3-dimensional shape of
Q12: The 3-dimensional shape of an elliptical galaxy
Q13: The 3-dimensional shape of _ is set
Q15: The type of AGN we see depends
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