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Whose research work helped Hubble in scaling galactic and extragalactic distances?

  • Henrietta Swan Leavitt

  • Isaac Newton

  • Albert Einstein

  • Marie Curie

Answer

Henrietta Swan Leavitt's research on variable stars helped Edwin Hubble in scaling galactic and extragalactic distances. She discovered the period-luminosity relation for Cepheid variable stars, which showed that the luminosity of a Cepheid is directly related to its period. This allowed Hubble to measure the distances to galaxies by observing the Cepheids in them.
Exploring the Cosmos: Discovering Edwin Hubble's Universe

Exploring the Cosmos: Discovering Edwin Hubble's Universe

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