A black hole is a region of space where gravity is so strong that nothing, not even light, can escape. Black holes form when very massive stars collapse in on themselves, either through merging with another star or at the end of their life cycle in a supernova explosion. The strongest gravitational forces are found in supermassive black holes located at the center of most galaxies, including the Milky Way, which can contain millions or billions of solar masses worth of material squeezed into a tiny space. Black holes themselves are invisible, but their effects on nearby stars and gas allow scientists to detect them.

1. BLACK HOLE

2. What is a Black hole ?
A black hole is a region
where gravity is so strong
that nothing—no
particles or even
electromagnetic radiation
such as light—cannot
escape from it.

3. .
• Cygnus X-1 pulls matter from the blue star
The gravity is so
strong because matter
has been squeezed
into a tiny space. This
can happen when a
star is dying.
Because no light can
get out, people can't
see black holes. They
are invisible. Space
telescopes with
special tools can help
find black holes.

4. Every galaxies have a black hole in
its centre. But some galaxies have
a Supermassive black hole[SMBH],
including our Milky Way.
The largest black holes are
called "supermassive." These
black holes have masses that
are more than 1 million suns
together.

5. How is a Black Hole
made?
• Stars colliding each other to form a supernova.
Scientists think the smallest black
holes formed when the universe
began.
Stellar black holes are made when
the centre of a very big star falls in
upon itself, or collapses. When this
happens, it causes a supernova. A
supernova is an exploding star that
blasts part of the star into space.
Scientists think supermassive black
holes were made at the same time
as the galaxy they are in.

6. .
• When it comes to black holes it is not the size that matters
but mass. A black hole can be just a several kilometers wide
but contain the mass of several suns.

7. This is the largest black hole ever found
• THE TON618 , with about 66 billion solar masses
1 solar mass = 2*1030kg

8. Here is an example to understand how big is
TON618.

9. As we all know black hole takes things into it. The
white hole is just opposite to it, it repels energies
or matter through it