In the diagram below, the approximate absolute magnitude of a Type II Cepheid with a period of 30 days is ____________________. 
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Q71: The _ hypothesis includes mergers with smaller
Q72: The _ hypothesis suggests that the Milky
Q73: Henrietta Leavitt discovered the period-luminosity relationship for
Q74: _ are groups of 100,000 to 1,000,000
Q75: Which stellar population has highly elliptical orbits
A)Pop
Q77: The _ of the galaxy contains population
Q78: O and B stars are examples of
Q79: Any element heavier than helium is collectively
Q80: The center of our galaxy is believed
Q81: The rapid rotation in the outer disk
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