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Q4: Which of these observations of Galileo refuted
Q4: Virtually the entire disk of the Galaxy
Q6: If our Sun belonged to Population II,
Q25: The session that the researcher holds with
Q30: Can a star become a red giant
Q41: Why can many more people witness a
Q45: On an H- R diagram, a protostar
Q97: Of all the stars in the sky,
Q141: If a star has a parallax of
Q162: Why does conversion of its core to