# Henrietta Swan Leavitt
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henrietta swan leavitt (; July 4, 1868 – December 12, 1921) was an American astronomer. A graduate of Radcliffe College, she worked at the Harvard College Observatory as a "computer", tasked with examining photographic plates in order to measure and catalog the brightness of stars. This work led her to discover the relation between the luminosity and the period of Cepheid variables.
The Woman Who Moved the Stars
In 1925, a young graduate student's careful analysis of photographic plates revealed that our entire galaxy was just one of countless others scattered across an unimaginably vast universe. Henrietta Swan Leavitt's discovery of how certain stars pulse with clockwork precision gave Edwin Hubble the …
The Woman Who Counted Stars and Changed the Universe
In the 1920s, Henrietta Swan Leavitt was hired to measure stars — not study them. But buried inside her meticulous data was a mathematical relationship so powerful it would shatter humanity's understanding of the size of the cosmos and hand Edwin Hubble the ruler he needed to discover that the uni…
Henrietta Swan Leavitt 1868–1921: The Woman Who Measured the Universe
In this episode of Obscure Lives Podcast, we uncover the remarkable story of Henrietta Swan Leavitt, a deaf woman working at Harvard Observatory who discovered the key to measuring cosmic distances and unlocked the true scale of the universe.
How Did We Measure the Universe? - The Hubble Tension and the Unfinished Cosmic Distance Ladder | Sleepy Facts About the Universe
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For thousands of years, the night sky was imagined as a fixed crystalline shell, a solid boundary containing the entirety of existence. The stars moved in perfect unison, and the universe had a…
What Can a Supernova Teach Us About Dying Stars? - The Magellanic Clouds and the Scale of the Cosmos | Sleepy Facts About the Universe
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The southern sky holds two soft, luminous patches known as the Magellanic Clouds. To ancient navigators and the Aboriginal peoples of Australia, they were practical tools and spiritual anchors.…
How Did Hidden Labor Shape Our Understanding of the Universe? - Beyond the Lone Genius in Astronomy | Sleepy Facts About the Universe
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The image of a solitary figure on a hilltop, rearranging the universe in a single night with a telescope, is a powerful cultural picture. But it is a compression that hides the true mechanics o…
S01 E02 "Silent Sky"
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Guests: Emily Rieder, Don Smith
Emily Rieder is a theatre studies lecturer at Guilford College; Don Smith is a physics and astronomy professor. Together they are teaming up for a truly unique …
How Did a Single Pulsing Star Rewrite the Map of the Universe? - The Andromeda Cepheid That Reshaped Cosmology | Sleepy Facts About the Universe
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For centuries, astronomers mapped the Milky Way with complete confidence that they were charting the entire universe. Every star, every faint smudge, and every spiral nebula was thought to belo…
Our longing for cosmic truth and poetic beauty | Maria Popova
Linking together the histories of Henrietta Swan Leavitt, Edwin Hubble and Tracy K. Smith, poet and thinker Maria Popova crafts an astonishing story of how humanity came to see the edge of the observable universe. (Followed by an animated excerpt of "My God, It's Full of Stars," by Tracy K. Smith)…
Our longing for cosmic truth and poetic beauty | Maria Popova
Linking together the histories of Henrietta Swan Leavitt, Edwin Hubble and Tracy K. Smith, poet and thinker Maria Popova crafts an astonishing story of how humanity came to see the edge of the observable universe. (Followed by an animated excerpt of "My God, It's Full of Stars," by Tracy K. Smith)…
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