Black hole is a region of space-time which
has gravitational acceleration so strong that
nothing can escape from it not even light.
Black holes are one of the most complex entities
in the universe.
There are two types of black holes, stellar
black hole and supermassive black hole.
Stellar size black holes are having mass 25
to few hundred times the mass of sun.
Stellar black holes are the last stage of
stars.
Supermassive black holes have mass equal to
mass of millions of Suns
Here we are not talking about stellar black
holes.
According to previous studies Scientists observed
that supermassive black holes exist in the
centre of galaxies.
But new study shows that there are millions
of supermassive black holes present in alone
milky way galaxy.
In 2018, NASA scientists found that there
could be between 10,000 and 20,000 black holes
gathered around the supermassive black hole
at the centre of our galaxy.
Research published in February 2019 said there
are 100 million "quiet black holes" in our
Milky Way galaxy.
The supermassive black hole named V616 Monocerotis,
which is the closest to our Earth at a distance
of just 3,300 light-years.
Milky Way is populated with these particular
type of black holes those are extremely hard
to detect.
Some Isolated black holes can attract matter
from the interstellar medium.
The flow of material attracted by these black
holes is usually weak and thus the radiations
emitted by these black holes are weak.
Generally black holes are detected by light
emitting acceleration disc around the black
hole.
This light emitting disc forms because of
friction, as material attracted by black hole
rotate about black hole with high speed before
swallowed by black hole.
But for Isolated black holes, the acceleration
disc is weak, that means it does not produce
strong emissions.
Because of this, such black holes are extremely
difficult to detect.
Scientists say that the technique of detecting
Isolated black holes would require extremely
sensitive equipments.
Probably this technique could not be used
to find most of the hidden black holes.
There is possibility of a supermassive black
hole present near to our solar system than
V616 Monocerotis.
V616 Monocerotis is 3300 light years away
from us.
In future if our solar system comes in the
range of gravity of such an isolated supermassive
black hole, then whole solar system along
with earth may get swallowed by it.
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