How stars are form?

            In today's post will try to explain how the stars are form and what causes a star to form.
            Stars are like huge balls of fire that emits a tremendous amount of heat and light.

stars dont form in few seconds, minutes and hours. star formation process is so slow that it takes millions of years.

A star begins its life inside vast molecular clouds of dust and gas.
these molecular clouds are also known as nebulae or dark nebulae.

they mostly contain hydrogen and helium molecules along with some other particles.

In Latin, nebula means mist.

normally these molecular clouds are cold and stable.
However, a nearby supernova explosion or galatic collision may send a shockwave or tremendous amount of energy through a molecular cloud.
Now in the molecular cloud, this energy causes a gravitational disturbance due to which it begins to collapse on itself under its own gravity causing hydrogen and helium to clumb up together.

thus, increasing the mass in the center of the cloud.

this increase in mass, increases the gravitational pull.

thus, attracting even more molecules and particles from the surrounding as more and more molecules and particles collapse or fall into the center of the cloud, the center begins to heat up.
this heated canter is known as protostar

A protostar continues to pull more molecules and particles and gets hotter and hotter until the temperature pressure reach such a extent that hydrogen nuclei begin to fuse with one another producing helium and releasing heat, light and radiation.
this process is called nuclear fusion.

When this happens the inward force of gravity is exactly balanced at the outward force created by heat and radiation.

this inward and outward forces maintain the balance and thus, A star is born.