How Stars are formed in Space?

Friends, when you look at the night sky, you find number of stars(on a clear nightsky). Have you ever thought that how they are created in space? Then let us find the answer.

A celestial body that produces energy in its core by nuclear fusion is known as star . There are about 1 billion trillion stars in the universe. Many of them have planets orbiting them. A Star's life is of millions of years and scientists gather information about life cycle of Stars by observing stars that are at different stages of their lives. The mass of the star determines the course for stars life. Let us know about the complete cycle of creation, existence and destruction of the star.

BIRTH OF A STAR :-

In space, Hydrogen and Helium gases, dirt particles is present in a large amount but at very low density. These gases sometimes collect to form a cloud called Nebula. When particles in a Nebula come closer, the gravitational force between them becomes effective and put them towards the centre of Nebula. Nebula contracts under gravity. Due to high pressure, kinetic energy of particles is converted into heat. When the temperature at the core reaches 107 kelvin, nuclear fusion begins. In this process, 2 hydrogen atoms is converted into 1 helium atom and a high amount of energy is liberated. With the start of Nuclear Fusion in its core, a star is born.

By the way, contraction due to gravitational force is active at this stage also but it is balanced by the matter and energy liberated outside from the core which creates force on outer matter. This equilibrium is maintained for billions of years.

DESTRUCTION OF A STAR:-

Our sun is nearly 4.6 billion years old and according to the data maintained by the scientists, it will last for nearly 5 billions years more in less or more similar condition. After this, it will become a red gaint (when the hydrogen fuel inside the core get depleted). The afterstage condition depends upon the intial mass of the star. If the initial mass of the star is 1.5 times less than the the mass of the Sun then the star becomes a White dwarf which later changes into a Black dwarf. While, if the mass of the star is 1.5 times greater than the mass of the Sun then it will create a Supernova which later becomes a Neutron star. If the mass of the Neutron star is 3 times the mass of the Sun then a Black Hole is created.

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Keywords:-
Star | Birth of star | Neutron star | Black hole | Equilibrium in star | role of equilibrium in formation of star | size of star | age of a star | death of a star | formation and destruction of a star | formation of sun | red gaint | age of our sun | when will sun die | when our sun will change into a red gaint |

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