How are stars formed in the sky?

 How are stars formed? तारे कैसे बनते हैं

a star in English - Look up in the sky at night, you will see twinkling stars above,

These stars are very pleasing to our eyes. But how do the stars that appear as tiny dots in the sky eventually form?

Where do these stars come from, as you would know that these stars are as small as they appear?

Very large and the process of formation of these stars is also not a small process.

After a process of millions of years, they become shining stars in space.

STARS

    

    

So let's know how these stars are finally formed. (star formation in English)…..

Birth of Nebula:-

Nebula is clouds of gas, dust particles, hydrogen gas, and helium gas present in space.

Which are formed due to the gathering of small dust particles due to gravity at someplace in the universe.

Apart from this, nebulae are also formed by supernova explosions when stars die.

A Nebula in Space

    

Gathering of nebulae to make a body:-

From here begins the first stage of star formation,

First of all, the particles of these nebulae gravitationally collapse among themselves.

That is, they come close to each other and form a gaseous sphere.

That is, the particles of the nebulae come close to each other due to their own gravity and form a huge gaseous sphere.

They emit gravitational potential energy in the form of energy.

As the temperature and pressure increase, this sphere starts rotating.

The formation of this first stage in the evolution of stars is called Proto-star.

Since it is an earlier stage of an evolved star, it is called a protostar.

DEATH OF STAR

Conversion of Protostar into Star:-

These protostars constantly attract gas, dust, etc. towards them, through their gravity.

Slowly this process continues. And there comes a time that

These protostars collect so much mass in their core.

That it becomes very dense.

After becoming very dense, the core of the protostar begins to generate such high pressure and temperature.

That they start fusing the hydrogen (which is actually the isotope deuterium of hydrogen) located in their center.

However, it depends on how much mass a protostar can collect inside itself.

If a protostar cannot have enough mass inside itself, it becomes a brown dwarf.

Now as the protostar collects a lot of mass.

They start the process of nuclear fusion.

Two hydrogen molecules combine to form one helium molecule.

From this, the protostar emits tremendous energy and light.

Which makes them shine. And now this star becomes a main-sequence star.

Now, this star is with a dense core and with a layer of plasma around it.

That is, now it takes the form of a developed star.

Stars in English

The balance of stars and their life span:-

The stars are always in equilibrium due to nuclear energy, due to the external force of the stars and due to the gravitational force applied inwards.

For how long will a star live, that is, it will exist.

It depends on how much mass is near that star.

A star with a large mass quickly dies after using up its fuel.

The same low-mass stars tend to live longer because of using their fuel slowly.