PBS Space Time PBS Space Time

What Happens If A Black Hole Hits Earth?

Sep 16, 2026 · 26m

Summary

This episode explores whether primordial black holes could be dark matter and if they have ever impacted Earth. The host explains that while stellar-mass black holes are too distant to pose a threat, asteroid-mass primordial black holes might frequently pass through our planet without destroying it. The discussion covers how such an event would appear as a bright atmospheric flash and generate detectable seismic waves, noting that the Tunguska event remains a potential candidate. The segment concludes by analyzing how unique crater shapes on the Moon could provide evidence of past black hol…

Topics discussed

Intro and LinkedIn Ad McDonald's Ad and Black Hole Intro Stellar Mass Black Holes and Cygnus X-1 Primordial Black Holes and Dark Matter Ruling Out PBH Masses via Lensing LinkedIn Ad McDonald's Ad and PBHs in Solar System PBH Impact on Earth: Physics Specifics: Phobos Mass Black Hole Eddington Limit and Atmospheric Entry Tunguska Event and Black Hole Hypothesis LinkedIn Ad Seismic Detection of PBH Impacts Rarity of Impacts and Gravitational Detection Detecting Craters on the Moon LinkedIn Ad McDonald's Ad and Crater Characteristics Conclusion: Implications of Discovery Promos: Space Tourism and Patreon Comments: Modified Newtonian Dynamics LinkedIn Ad McDonald's Ad and Fuzzball Intro Fuzzballs: Complementarity and Holography Testing Fuzzballs: Gravitational Waves Jokes: Schrödinger's Hairballs Uber Eats Ad Silicon Valley Bank Ad
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