In Pics: All you need to know about the origin of the universe

Nearly 14 billion years ago, the universe began with a random fluctuation in a completely empty void. Scientists call this theory for the origin of the universe the Big Bang. But, is there an alternative theory? Take a look…

The observable universe is the spherical region about 90 billion light-years in diameter, that is centred on Earth. The universe continues infinitely outside of Earth’s observable universe.

Astronomers rely on both theory and observation to make three key assumptions about the universe.

In addition to these assumptions, the universe exhibits several key properties that have been observed. One of the observation is that the universe emerged from a hot, dense state at a finite point in the past.

The first elements created in the universe were hydrogen and helium.

Some of the alternative theories include Eternal Inflation, according to which, after the Big Bang, the universe rapidly expanded during a brief period called inflation, and this expansion never stopped.

The Oscillating University theory suggests that the universe goes through an endless cycle of Big Bangs followed by Big Crunches that restart the cycle.