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Q28: _ are great lava flows covering 17%
Q30: Jovian worlds that orbit close to their
Q45: _ are small dark nebulae about 1
Q53: O and B stars are examples of
Q57: To tell the difference between a neutron
Q93: If in a gas the opacity is
Q104: If the average density of the universe
Q106: Which of the following types of Universe
Q107: The visual wavelength image shown above is
Q122: The above visual wavelength image of the