At the same time, some in west consider Anaximander as the father of Cosmology.
Anaximander (610 BC-546 BC) was first to develop a cosmology, or systematic philosophical view of the world because he wrote oldest prose document about the Universe and the origins of life..
In order to understand how the universe has changed from its initial simple state following the Big Bang into the magnificent universe we see as we look at the night sky, we must understand how stars, galaxies and planets are formed over time.
The universe is comprised of mostly hydrogen and helium..
Our universe began with an explosion of space itself - the Big Bang.
Starting from extremely high density and temperature, space expanded, the universe cooled, and the simplest elements formed.
Gravity gradually drew matter together to form the first stars and the first galaxies..
Cosmology is the study of the nature of the universe as a whole entity.
The word cosmology is derived from the Greek kosmos meaning harmony or order.
Cosmologists are interested in the formation, evolution and future of the universe and its constituents..
The Big Bang was the moment 13.8 billion years ago when the universe began as a tiny, dense, fireball that exploded.
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?.
The cosmological principle derives from the Copernican Principle but has no foundation in any particular physical model or theory, i.e. it can not be `proved' in a mathematical sense.
However, it has been supported by numerous observations of our Universe and has great weight from purely empirical grounds..
The origins of today's cosmology began with the observation in the early 1500s by Nicolaus Copernicus that the Earth revolves around the Sun.
The next step was the discovery in the late 1600s by Isaac Newton that objects in space behaved according to the same laws of physics as objects on Earth..
Anaximander (610 BC-546 BC) was first to develop a cosmology, or systematic philosophical view of the world because he wrote oldest prose document about the Universe and the origins of life.
He was also the first one to conceive a mechanical model of the world..
The first cosmologists were Babylonians and Egyptians who observed the sky and who could predict the apparent motions of the Sun, moon, brightest stars and the planets.
In the 4th century BC, Greek philosophers deduced that the stars were fixed on a celestial sphere which rotated about the spherical Earth.
