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Mean temperatures in Europe during the Maunder minimum, when virtually no sunspots were seen between 1645 and 1715, were
Q34: The first satellite discovered in orbit about
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Q66: Which of these characteristics has NOT been
Q67: If the intrinsically faintest stars in Earth's
Q90: What is the Sun's photosphere?<br>A) envelope of
Q106: How do two unequal-mass stars in a
Q209: Degeneracy occurs when<br>A) electrons inside a star
Q225: An astronomer plots the H-R diagram of
Q253: The spectrum of an ordinary main-sequence star