Black holes are regions of space with extremely strong gravitational pulls that not even light can escape. They are formed when large stars collapse in on themselves at the end of their life cycles. There are three main types of black holes: spinning black holes, which rotate rapidly; electrically charged black holes; and spinning and charged black holes, which are the most dangerous due to possessing both spin and an electrical charge.

2. What are black holes ?
The black holes are the region of space. Which are mainly
created by dyeing star. These have that strong
gravitational pull that light also cannot escape it. Due to
high gravitation they are that dark that we cannot see
them. In 1967 john wheeler introduced the term black
hole. Earlier it was called frozen star.
It is because when a star is
collapsed on itself gradually it will turn into black hole .
Due to this it will lose its light and heat energy and will be
called as frozen star.
There is no tunnel in black holes
as any object is placed at the event horizon of the black
hole it will turn it to cosmic rays. If any stick is passed
through the hole that stick will not be seen from the
other end of black hole.
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4. Types of black holes
1.Spinning black holes:-
There are three types of black holes. One of them is called
spinning black holes. The picture given shows spinning
black holes clearly. As per the name hint its characterstics.
These black holes spin like a water sprinkler. They are also
known as rotating black holes.
keeping in mind of other kinds of
black holes these are somehow safe. These black holes are
not electrically charged.
Now we will learn about other
two types of black holes i.e electrical black holes and
spinning electrical black holes in next pages.
firstly abut electrical black holes.
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5. 2.Electrical black holes:-
These are second type of black holes, which are some
how dangerous to us. They are known as electrical or
electrostatic because, these are electrically charged.
Therefore the are also called charged black holes .
It is called nordstrom (reissner) black
hole if the angular momentum is zero. It is called newman
(kerr) black hole if it has both angular momentum and
electrically charged. In first and second picture you can
easily understand that-what re charged black holes?
3.Spinning and charged black holes:-
These are the third type of black holes, which are most
dangerous to us. These are also called supermassive black
hole . This is because these black hole spin and are
electrically charged also. They also spin due to their own
gravitational force.
The closest supermassive blackhole
is in the center of our milkkey way galaxy i.e monocerotis.
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