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The major feature that distinguishes a sunspot from other regions on the Sun is
Q50: If an asteroid was moving in a
Q57: The spectral class of the star Enif
Q85: Two stars of equal mass form a
Q113: Which of these events is NOT a
Q123: A typical granule on the surface of
Q133: How can one characterize the rotation of
Q147: Will the Sun undergo a helium flash?<br>A)
Q151: Rigel, the bright star in the knee
Q199: Where do horizontal-branch stars get their energy?<br>A)
Q246: The Sun has existed for a very