EVERYDAY SCIENCE

Detailed explanation-1: -Big Bang Theory is the idea that the universe began as just a single point, then expanded and stretched to grow as large as it is right now. It is the simplest explanation for the origin of the universe which scientists claim is still expanding. Was this answer helpful?

Detailed explanation-2: -The Big Bang event is a physical theory that describes how the universe expanded from an initial state of high density and temperature. Various cosmological models of the Big Bang explain the evolution of the observable universe from the earliest known periods through its subsequent large-scale form.

Detailed explanation-3: -The most widely accepted explanation is the big bang theory. Learn about the explosion that started it all and how the universe grew from the size of an atom to encompass everything in existence today.

Detailed explanation-4: -Most astronomers use the Big Bang theory to explain how the universe began. But what caused this explosion in the first place is still a mystery. So, what has happened since the Big Bang? Since the Big Bang, the universe has been expanding.

Detailed explanation-5: -What evidence is there to support the Big Bang theory? Two major scientific discoveries provide strong support for the Big Bang theory: • Hubble’s discovery in the 1920s of a relationship between a galaxy’s distance from Earth and its speed; and • the discovery in the 1960s of cosmic microwave background radiation.