WHAT IS BLACK HOLE?
Black hole is an object so dense that space and time around it are inescapably modified. It is
the area of such a high gravitational pull that not even light, the fastest entity can escape from it.
Anything that passes the boundary of black hole called an 'event horizon' cannot escape the
gravitational pull of the black hole and is permanently trapped in there.
HOW ARE BLACK HOLES BORN?
When a star dies in a supernova explosion, all of its mass collapses into very small space. And
if the star is big enough, black hole will form. In fact any object can be made into a black hole by
compressing its mass to a very great extent.
TYPES OF BLACK HOLES:
Two widely known types of black holes are:
STELLAR MASS BLACK HOLES with mass 100 times than of the sun and size of an asteroid.
SUPERMASSIVE BLACK HOLES with mass millions or billions times that of the sun. They lie at
the centre of the galaxies, including our milky way galaxy.
Largest known supermassive black hole is S50014+81 which is 40 billion times the mass of our sun.
By the way, black holes do not suck things inside like a vacuum cleaner. But the experience of
time is different around black hole. The time seems to slow down as you approach the black
HOW BLACK HOLES DIE?
Black holes emit energy very slowly in the form of Hawking's radiation and become smaller and
smaller until the time when they become extremely small and burst out emitting all the energy
stored in them which is equal to billions of nuclear bombs exploding at the same time. But this
process is very slow.