free webpage counters What is Universe and theories of origin of Universe. Your SEO optimized title page contents

What is Universe and theories of origin of Universe.

What is Universe?

Universe may be defined as the collective name of all the known and unknown celestial objects e.g., the solar system, the stars, the galaxies, constellations and all the matter which lies in the space between these objects. According to an estimate, the Universe is 10-20 thousand million years old and measureĀ 1010 light years across. There are many theories about the origin of the Universe. Out of these the ”Big Bang” theory says that the Universe flashed into existence from a very small agglomeration of matter of extremely high density and temperature. Subsequently, it expanded a dense and hot globule of gas. After 200 million years, the first stars came into existence. Similarly, the Sun was formed about 4.5 billion years ago. This process continued for millions of years till all the celestial bodies came into existence.

Theories of Origin of Universe:

There have been presented three famous theories regarding the origin of the Universe:

1. The Big Band Theory

2. The Oscillating Universe Theory

3. The Steady State Theory


01. The Big Bang Theory:

According to this theory, the Universe originated as a result of a big explosion that took place about 10-20 thousand million years ago. The matter scattered around and condensed into lumps called galaxies. The Universe has been expanded during all this period. With the passage of time, it has been thinning out. The galaxies are still rushing outwards.

02. The Oscillating Universe Theory:

According to this theory, the expansion of Universe will be followed by the contraction of the galaxies resulting in another Big-Bang. The process of the Universe continues in endless cycle of expansion and contraction. Each phase has its own laws of nature.

03. The Steady State Theory:

This theory states that the Universe never originated instantly and will continue for ever. With the expansion of the universe, new matter comes into existence and fills the spaces. This theory was put forward in 1948 by two Australian astrologers, Herman Bondi and Thomas Gold.

Add a Comment

Your email address will not be published. Required fields are marked *