Which best describes the big bang theory?

Answer 1

It is the theory that the current universe started with a "big bang". To understand how the theory arose, it has been observed that the universe is expanding. If you imagine time going backwards, then the further back you go, the smaller the universe gets, at some point the universe is so small it is a singularity.

The big bang theory predicted that there would be a background noise from the explosion still detectible in deep space; the noise was detected - in fact, it's a problem in radio astronomy that there is always noise present.

Answer 2

The universe exists. This existence must have had a first cause, and therefore could not be infinite; the universe must have a beginning. Some cause, self-sufficient and not brought about by any other cause, must exist. interaction of somehow uncaused particles that were somehow in uncaused motion through somehow uncaused forces created an event which began the universe as we know it. This is called the Big Bang theory, and many, many questions still remain pertaining to the questions of the origin of the universe.

Answer 3

This is based (among other things) on the observable evidence that the Universe is expanding.

The basic idea is that everything in the observable Universe (which has a radius of about 46 billion light-years) started closely together, some 13.8 billion years ago, in a space smaller than an atom, and in an extremely dense and hot state. From there it expanded, and continues to expand today; after some time, stars and galaxies started forming. I suggest you read a more detailed explanation, as well as a timeline of different events, for example, in the Wikipedia article on "Big Bang".

Answer 4

Matter was compressed into a single point and then exploded outward to form the universe - APEX

Answer 5

All matter in the universe has expanded outward from a single point

Answer 6

the big bang theory is a cosmological model wich states that how was universe created and why it is expanding.

Answer 7

Concise synopsis of the big bang theory's background, historical foundations, major problems.

Answer 8

Matter was compressed into a simple point and then exploded outward to form the univers.

Answer 9

The Universe was formed as a result of a massive explosion sending out material in all directions at a great speed