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A second magnitude star in Ursa Major is brighter than a fourth magnitude star in Orion.
Q6: The energy of the first level in
Q22: The _ is a measure of the
Q29: The _ defines the "super strategy" of
Q45: How much does the RA coordinate of
Q49: Why is scientific notation used in science?<br>A)
Q50: Patents and trademark information should be described
Q62: Which part of the feasibility study contains
Q82: A scientific model is a mental conception
Q93: What was a common feature of astronomy
Q115: The diagram shows three approximate locations of