WHAT WE KNOW WITH CERTAINTY ABOUT THE FIRST SECOND AFTER THE “BIG BANG”. What do we know about the Big Bang? In sum, Pomeroy quotes Caltech astrophysicist Sean Caroll: “We don’t have any idea what happened at the purported moment of the Big Bang,”
What we do know a lot about is what happened in the first second after what we call the “Big Bang”. Pomeroy says: “Boatloads of evidence and observation support the notion that the entire Universe was once unfathomably dense and hot, and confined to a vastly smaller area. Moreover, it expanded and cooled into everything that is today.” Caroll agrees: “The Big Bang model…the general idea that the universe has been expanding from a hot, dense early state, that’s 100 percent true…”