The mysterious Black hole

The mysterious Black hole "

A star twinkles due to the reaction of hydrogen atoms in the star .One hydrogen bonds with another hydrogen to form a helium atom, this is called as fission.By this process more and more amount of energy and radiation is emitted .

credit: The sun

The stability of star

By the process of nuclear fission, some amount of radiation gets emitted from the center of the star(also called as the core of the star), simultaneously it is attracted towards the core due to its high gravity , Like this two forces are acting oppositely two keep the star stable.

After so many long years the hydrogen gets fused and there is no more hydrogen for fusion , then the reaction may slow down .So then due to gravity of the core the star gets shrink to size of a ball .It is called as neutron star.Due to the high density of the neutron star it gets explodes.

If the neutron star is very big then it forms a black hole.These black holes have highest gravity .If any star to be a black hole its size should be 20 times the size of the sun. These black holes are called as stellar black holes

Super massive black holes have a size that should be some crores times the size of the sun

credit: third party image reference

The name of the black hole in milky way is Sagittarius A * the diameter of the black hole is 4,40,00,000 km

The distance of the Sagittarius A * from earth is 25,640 light years . The Physics laws does not apply in this black hole . Some scientists said that these black holes are the way to another universe .Light can't reflected from the black hole, but how we find where these black holes are?.

Stars surrounding the black holes revolves with high velocities.

credit: s. Hawking

The radiation releasing from the black hole is called as hawking radiation .