Tag: Event horizon

• The Edge and the Age of the Universe: Where 13.8 Billion Years and 46.5 Billion Light-Years Come FromHow the reciprocal of the Hubble constant yields 13.8 billion years, why the observable universe reaches 46.5 billion light-years, and whether space itself has an edge.PhysicsCosmologyHigh school / generalCosmic expansionHubble constantAge of the universeEvent horizonObservable universe~28 min
• What Lies Beyond a Black Hole: Event Horizons, Spaghettification, and EvaporationHow can an object exist that even light cannot leave? We derive the Schwarzschild radius, then follow tidal forces, Hawking evaporation, and why wormholes stay shut.PhysicsCosmologyHigh school / generalBlack holesEvent horizonHawking radiationTidal forcesWormholes~19 min