THRUSTING SEVEN SEAS INTO A GRAIN OF SALT

Our sun is a ball of fire. Its flares are extending to thousands of kilometers. It is in the middle life and produces such a enormous energy. It is a small star and all the stars are similar to our sun.

When a star is living it produces light and heat energy through nuclear fusion. That is, by combining hydrogen atoms into helium atoms. When the star runs out of the nuclear fuel, it will die. During the death of a big star, its outer shell will blast off with such a brightness that it will be visible throughout the galaxy even in daytime. This phenomenon is called 'supernova'. Next, star's inner core will get compressed due to gravity. That is, star will collapse under its own weight. It will collapse into a mathematical point called "gravitational singularity". All the mass is concentrated in that point. Hence it will have zero volume, infinite density and enormous gravity.

The influence or the gravitational field of the singularity will extend to certain radius or to a certain circular area around the point mass. The boundary of that area is called 'event horizon'. Anything, even light that reaches event horizon will be sucked in by huge gravity and will never return. This dead star is called "black hole". No light returns, so it is black. Everything falls inside, so it is a hole.

A star with the mass of our sun may become a black hole of 3 km radius. A star with the mass of earth may become palm sized black hole{hypothetical}. Our sun will never become a black hole because it is a small star.

At the center of our milky way galaxy, there is a super massive black hole with the mass of 4 million suns. Our universe is born from such a singularity.

If you read somewhere that a mountain can be converted into an ant, it may not be a 'cock and bull' story.

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