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Q17: What would the age of the universe
Q23: The observed characteristics of a quasar are
Q79: Distances to a nearby galaxy can be
Q101: Suppose an astronomer detects an object that
Q123: When Hubble first calculated the recessional speeds
Q125: What is the distribution of giant molecular
Q126: The presence of a supermassive black hole
Q129: How many fundamental forces are there in
Q153: What is the brightest standard candle, and
Q172: What is a rich cluster of galaxies?<br>A)