The History of Physics Podcast

In this episode we trace how Tycho Brahe’s precise observations forced Johannes Kepler to abandon the long‑held belief that planets move in perfect circles. By discovering elliptical orbits, Kepler not only resolved planetary speed variations but also laid the geometrical groundwork for Newtonian gravity and modern celestial mechanics.

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In this episode we trace Aristarchus of Samos’s bold claim that the Earth orbits a gigantic sun—an idea that pre‑dated Copernicus by nearly a millennium. We explore his geometric reasoning, the backlash from geocentric authorities, and how his numbers seeded a paradigm shift that only blossomed when technology caught up.

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In this episode we follow the Chinese Mohists’ first recording of the camera obscura around 500 BCE, turning a speculative idea into an experiment that challenged contemporary notions of light and image. We trace its journey through Ibn al‑Haytham’s 10th‑century experiments and see how it laid groundwork for telescopes, lenses, and modern imaging.

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From Lippershey’s first patent to Galileo’s Sidereus Nuncius, this episode follows the birth of modern observational astronomy. It explores how a modest telescope unveiled moons around Jupiter, phases of Venus, and a new world view that overturned centuries‑old geocentrism.

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Explore how 14th‑century scholars at Merton College set out to mathematically describe falling bodies, challenged Aristotle’s long‑standing view, and laid groundwork that would later inspire Newton and the modern physics of motion.

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In this episode we follow Arthur Eddington and his team as they set out on the 1919 total solar eclipse to measure starlight bending, a key test of Einstein’s General Relativity. We explore the technical challenges, the political backdrop of post‑war Britain, and how that single measurement reshaped our understanding of gravity, observation, and science communication.

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Explore how the first nuclear detonation at White Sands served as a high‑stakes physics experiment that validated neutron diffusion theory, set new safety and environmental standards, and seeded technologies that underpin modern particle accelerators, fusion research, and quantum diagnostics.

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In this episode we trace how Al‑Biruni used a simple mountain peak to measure the planet’s radius, challenging contemporary assumptions and laying groundwork for modern geodesy. We explore his methods, the scientific milieu of Ghazni, and the lasting impact on astronomy and measurement.

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This episode follows Ludwig Boltzmann’s revolutionary statistical approach to entropy, showing how his counting of microstates resolved the paradox between reversible microscopic laws and irreversible macroscopic behavior. We explore the debate with Loschmidt and Clausius, the cosmological implications of a low‑entropy beginning, and how this legacy underpins modern thermodynamics, black‑hole physics, and quantum information.

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This episode traces how the legendary story of Galileo dropping cannonballs from the Leaning Tower—whether true or embellished—shaped scientific thinking about free fall, challenged Aristotle, and set the stage for Newtonian mechanics. We dig into Renieri’s 1610 experiment, the cultural forces that kept the myth alive, and how modern simulations reveal what really happened.

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