Ay 1 Lecture - May 27, 2026
These are the video recordings for Professor Djorgovski's Ay1 course for the spring quarter of 2026. This is an Introductory Astronomy course offered for Caltech undergraduate students.

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Ay 1 Lecture - June 3, 2026

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The most beautiful formula not enough people understand

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URGENT: James Webb Found a DEAD Version of Earth — And It's VERY Disturbing

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Ay 1 Lecture - May 13, 2026

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Sarah Paine - Why Putin and Xi can't escape geography

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Roger Penrose and Brian Cox discuss 'remarkable new evidence' about the origins of the universe

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The Insane Genius of a Formula 1 Gearbox

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The Pattern Nobody Can Prove (But Everyone Believes)

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The Hardest Questions in Physics | World Science Festival

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Scott Aaronson - The TRUTH About Quantum Computing

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Reinventing Entropy | Compression is Intelligence Part 1

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Ukraine's drone war is isolating Crimea

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The Riemann Hypothesis, Explained

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Brian Cox breaks down the most mysterious scale in the cosmos

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Ay 1 Lecture - May 11, 2026

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When Physics Fails: The Problem of Space-Time

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Physicist explains the nature of time: It's a mind-blowing mystery | Don Lincoln and Lex Fridman

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What Is Quantum Mechanics Really Telling Us? | World Science Festival

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Math Encounters - Primes and Zeros: A Million-Dollar Mystery

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