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Bidelman's work helped classify stars with unusual concentrations of what?

  • Water

  • Metals

  • Oxygen

  • Dark matter

Answer

Metals are the key elements that Bidelman's work helped classify stars by. These stars have peculiar abundances of metals in their atmospheres, setting them apart from the more common stellar compositions. By studying the presence and quantities of various metals, astronomers can gain insights into the star's formation, evolution, and the processes shaping their chemical makeup.
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The Stellar Legacy of William P. Bidelman: An Astronomical Quiz Quest

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