#137 – Alex Filippenko: Supernovae, Dark Energy, Aliens & the Expanding Universe
Lex Fridman Podcast
00:00
From Geocentrism to Cosmic Threats
This chapter explores the historical evolution of astronomical theories, focusing on the shift from a geocentric to a heliocentric model led by figures like Copernicus and Galileo. It emphasizes the importance of observational data in scientific progress and discusses existential threats to humanity from celestial bodies and natural disasters. The conversation also highlights the fragility of modern civilization and the challenges faced in mitigating potential cosmic risks.
Transcript
Play full episode
