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Excess atmospheric _______________ indicates that Venus once had substantial amounts of water on its surface.
Q2: A collection of small, icy bodies are
Q9: The cycle of nitrogen at Triton's north
Q19: Which of the following statements is true?<br>A)
Q20: Which method does the Kepler space telescope
Q24: During which stage of planetary development did
Q29: Which space observatory uses the transit method
Q33: Mare Imbrium is the result of a
Q41: How did Mars get its two moons?<br>A)
Q41: A meteorite that is discovered on or
Q51: Phobos is so close to Mars that