Why The Universe Expands

Description

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Henrietta Swan Leavitt, an American astronomer hired as human computer made a startling discovery. Not only did it help humanity realise that the universe is teeming with billions of galaxies, but it led Edwin Hubble to eventually discover that the universe must be expanding, eventually leading to the big bang theory. The entire paradigm shift is centered around her discovery. But what exactly did she discover?

Chapters

00:00 The astronomer who made a startling discovery
01:07 Einstein’s cosmological constant
02:54 Friedmann’s counter argument against the constant
04:00 Vesto Slipher’s puzzling discovery of the spiral ‘nebulae’
07:40 The best measuring methods until the 1920s
09:04 A serious upgrade
10:50 Henrietta Levitt enters the story (Levitt’s Law)
16:15 The paradigm shifts after Levitt’s law
17:50 The Hubble Law
20:38 Einstein’s blunder, or was it?

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