Black holes

Black holes

Black holes  are not actually holes. 

Black holes are  stars. These stars are not any normal stars. These are the stars which are  very massive in size.Stars use hydrogen as a fuel .Due to the reaction  of these fuels ,  gives heat and light energy as products . Due to the heavy masses of these stars they use up all the fuel [that is the hydrogen in this case] which is there in space in their atmosphere.Due to the massive mass the gravitational pull also will be high.After using all the fuel the star starts to shrink until it becomes a  perfect sphere .But due to the strong gravitational pull  the light rays start to bend  and then they bend so deep that no light ray will be able to come out of the stars atmosphere.All the rays will be in the star itself.If you now look for the same star , it won't be seen .The star now is so black that it  would seem like it is  contrasted with the space . As we know that light is the fastest form of energy, and it can't escape  this massive gravitational force.This means nothing can escape this pull. These massive objects still have their attraction forces but they can not be seen using normal telescopes.These 'dead"stars itself are called as Black hole