Universe and Outer space

In this post, we shall see how a star is actually born. Imagine that we somehow managed to move back in time and go to the early universe, an era when most of the stars came into existence. We are now about 13 billion years into the past. The universe is still in its nascent stage. We can see localized clumps of condensing gas almost everywhere. Let us focus our attention on a particular ball of condensing gas which is all set to give birth to a Star.

This cloud of gas and dust is called a Nebula. Once this molecular cloud acquires sufficient density of matter, it starts collapsing under its own gravitational force. Now move forward in time because this period of gravitational contraction is going to last atleast for the next 12 million years. During this time, the pressure inside this dense ball keeps building up and its temperature slowly increases. This heating up of the contracting matter causes it to glow, forming Protostars. So, at this point of time we can see the first traces of light. When the temperature of this cloud reaches 15 million degree centigrade, the nuclear fusion of hydrogen to helium starts at the core and the star enters its main sequence.

Say hello to our New Born Star!!!