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If the stars at the turnoff point of a cluster have a mass of 3 times the mass of the Sun,what is the age of the cluster?
Q1: Harlow Shapley found the distance to the
Q11: The _ of the galaxy contains population
Q14: Which of the following mechanisms would be
Q21: How does the traditional theory of the
Q40: What does the strong force do?<br>A)It binds
Q40: Sunspots often appear in pairs.
Q51: Based on statistical studies,what is the most
Q69: What would make parallax easier to measure?<br>A)the
Q97: When energy is carried by the bulk
Q107: If you move an electron from a