2. Origin of the Universe

The most popular argument regarding the origin of the universe is the Big Bang Theory. It is also called expanding universe hypothesis. Edwin Hubble, in 1920, provided evidence that the universe is expanding. As time passes, galaxies move further and further apart. The distance between the galaxies is found to be increasing and thereby, the universe is considered to be expanding. Here, the expansion of universe means increase in space between the galaxies. However, Scientists believe that though the space between the galaxies is increasing, observations do not support the expansion of galaxies in itself.

An alternative to this was Hoyle’s concept of steady state. It considered the universe to be