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Q10: As a high-mass main-sequence star evolves off
Q15: Suppose you measured H-R diagrams for the
Q18: If the carbon dioxide in Earth rocks
Q28: Black holes have an infinitely small radius,but
Q34: Where are the most metal-rich stars found
Q45: The CBR is a snapshot of the
Q51: Consider a small comet nucleus,whose diameter is
Q57: According to the conservation of angular momentum,if
Q65: Compare the volume of the Sun with
Q68: What is the main property of a