Black Hole

There are some phenomenon in universe which shows the unthinkable possibility of nature. One of the most strange phenomenon is black hole .
   
As name suggests ,  they are black but not a hole on a contrary just a sphere in space with infinite gravitational intensity and infinite density (No volume just mass)  As per relativity the black hole generates infinite curvature of space time

If talk about structure of black hole it has a radius of millions of km. The boundry is known as event horizon inside which no light is present.  The outer environment when it is near a star generates assertion disc (billions of km in radius) which is made up of gas.

The thing that makes black hole a crazy and interesting subject is the phenomenon that occurs.  The most strangest phenomenon is dilation of time.  Hypothetically If we are at event horizon for about 10 min the earth will be ahead by 99- 100 years.
Inside a black hole time ceases.  Another phenomenon is stretching, when we come near black hole it will strech a body in elastic form. One of the phenomenon is red shift.  In it the particle when goes toward event horizon it becomes reder and reder and ultimately dissapers

Hypothetically it is said that black hole is a wormhole which through particle in another space time of other dimension through white hole.

Black hole has a limited lifetime which is about 10^63years
This is due to virtual particles

If to read on virtual particle have another topic (secrets of virtue)