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What do astronomers believe will be the final state of our universe?
Q5: Another name for a longitudinal study is
Q11: The standard Big Bang theory successfully predicts
Q15: We expect the kinds of galaxies that
Q18: Data sets that contain two scores that
Q26: Special relativity says that all observers moving
Q32: Bill concludes that he is 95% confident
Q53: If there is a 2 million M<sub>⨀</sub>
Q67: Which of these statements about quasars is
Q79: Why does the sum of Ω<sub>mass</sub> and
Q86: The density of ordinary luminous matter can