2 days ago · The most widely accepted explanation for the origin of the universe is the big-bang theory, which proposes that the universe began approximately 13.8 billion years ago in an …

The Big Bang is a physical theory that describes how the universe expanded from an initial state of high density and temperature.

Jan 29, 2025 · The Big Bang Theory explains how the universe began with an infinitely hot and dense single point that inflated to form the ever-expanding cosmos we see today.

Jan 18, 2017 · How did the universe begin—and what were its early days like? The most popular theory of our universe's origin centers on a cosmic cataclysm unmatched in all of history—the …

Jul 17, 2025 · They hope to uncover clues about what happened in the universe’s first moments to create the varied, textured universe we inhabit today. According to the leading theory, the …

Oct 22, 2024 · The origin, evolution, and nature of the universe have fascinated and confounded humankind for centuries. New ideas and major discoveries made during the 20th century …

The Big Bang was the moment 13.8 billion years ago when the universe began as a tiny, dense, fireball that exploded. Most astronomers use the Big Bang theory to explain how the universe …

Hubble’s discovery was the first observational support for Georges Lemaître’s Big Bang theory of the universe, proposed in 1927. Lemaître proposed that the universe expanded explosively …

Dec 23, 2025 · How did the Universe we know come into existence? And how do we explain its origin? These are some of the questions cosmologists and physicists have been trying to …

Scientists at the Institute for Theory and Computation work to propose new methods of deciding which theory is correct through astrophysical observations and discovering the exact origin of …