Physics

The Black Hole Universe: A Model of Cosmological Interior Spacetime Authors: Vivek P Nair Abstract: We present a speculative cosmological model wherein the observable universe is hypothesized to be the interior spacetime of a supermassive black hole. The standard cosmic expansion, described by the Hubble-Lemaître law, is proposed not as an expansion of space in the traditional sense, but as a direct consequence of the relativistic dynamics within the black hole's event horizon. In this framework, the timelike nature of the radial coordinate inside the horizon is interpreted as cosmic time. The model offers alternative mechanisms for established phenomena: it posits that light can escape the interior, but undergoes extreme gravitational redshift, potentially resolving the information paradox. It replaces Hawking radiation with a "Photon Penrose Process" where ambient photons extract energy from the black hole via gravitational slingshot, causing it to evaporate ove...