The lifetime of a star is determined by its initial ______________.
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Q158: When the absolute magnitudes, or brightnesses, of
Q159: The Greek astronomer who assigned the stars
Q160: The remaining core of a planetary nebula
Q161: The cataclysmic explosion of a star that
Q162: Clusters containing clusters of galaxies are called
Q164: The letters LMC refer to the galaxy
Q165: An extremely large collection of stars bound
Q166: The most distant known objects in space
Q167: According to the _ theory, the universe
Q168: The cluster of galaxies that includes our
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