Stars are formed in clouds of gas and dust, known as nebulae. Nuclear reactions at the centre (or core) of stars provides enough energy to make them shine brightly for many years. This stage is known as the 'main sequence'. The exact lifetime of a star depends very much on its size. Very large, massive stars burn their fuel much faster than smaller stars and may only last a few hundred thousand years. Smaller stars, however, will last for several billion years, because they burn their fuel much more slowly.
In This Video, we will discuss:
1. About the Formation of star
2. About Protostar
3. Main sequence star
4. Giant dwarf- Neutron star
5. Black hole
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