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Q1: From what part of the H-R diagram
Q6: Which one of the following IS a
Q20: The lowest-mass object that can initiate thermonuclear
Q21: What is the difference between a population
Q23: Radar maps of Venus show impact craters.
Q52: Small _ can confine sections of Saturn's
Q62: The existence of the Oort cloud cannot
Q76: The graph below plots the escape velocity
Q106: Gravitational lensing<br>A) occurs when light passes near
Q125: Recent high resolution radio observations show that