On average, elliptical galaxies are much older than large spiral galaxies.
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Q7: When observing a very distant quasar, we
Q8: While yet unseen, some gravitational evidence suggests
Q9: Giant irregulars are the most massive of
Q10: The last quasar probably died out a
Q11: Distant galaxies tend to be much bluer
Q13: Galaxies in clusters are much more likely
Q14: Vast majority of the known volume of
Q15: A large cluster's mass can be over
Q16: Most large spirals and ellipticals are comparable
Q17: While quasars may have now vanished, the
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