Starry nights have always attracted us since the childhood. You may also have thought of these stars and had numerous questions in your mind. Questions such as how many stars are there in the universe? How did they come into existence? May be many more such questions are still there in your mind. In this blog, you will know how these “twinkling little stars” were formed.
The
distribution of matter and energy was not even in the early universe. These
initial density differences gave rise to differences in gravitational forces
and it caused the matter to get drawn together. These formed the bases for
development of galaxies.
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| Large numbers of stars in a Galaxy |
A galaxy
contains a large numbers of stars. Galaxies
spread over vast distances that are measured in thousands of light-years. The diameters of individual
galaxies range from 80,000 – 150,000
light years. A galaxy starts to form
by accumulation hydrogen gas in the form of a very large cloud called nebula.
Eventually, growing nebula develops
localized clumps of gas. These clumps continue to grow into even denser gaseous
bodies, giving rise to formation of
stars. The formation of stars is believed to have taken place some 5 – 6
billion years ago.
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| Clumps of gases |
A light year is a measure of distance
and not of time. Light travels at a speed of 300,000 km/second. Considering
this, the distances the light travels in one year is taken to be one light year. This equals to
9.461*1012 km.
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Formation of Stars
Reviewed by Deepworld
on
November 17, 2019
Rating:
Reviewed by Deepworld
on
November 17, 2019
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