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164. Unravelling the Universe, Again

People I (Mostly) Admire

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Measuring the Cosmos: Challenges and Innovations

This chapter explores the complexities of measuring astronomical distances and the historical significance of techniques such as parallax and Cepheid variables. It highlights Henrietta Leavitt's period-luminosity relationship, which revolutionized distance measurement, and the role of type 1A supernovae as standard candles in observing cosmic expansion. The discussion underscores the advancements in technology that have enhanced our understanding of the universe, while also addressing challenges like interstellar dust and the rarity of supernovae.

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