hi friends this is Karthikeya
welcome to my channel Karthik's gallery
In previous video we discussed about
facts now I am going to explain about
Black holes so let's start our video
A black hole is a region in the universe
which has intense gravity the gravity is
So powerful that even light cannot
escape from the time near the black hole
is also slow because time and space also
cannot escape from the black hole the
black holes are so strong that it can
absorb stars into it not only small stars
even big stars are absorbed into
it and they get destroyed
black holes are formed when stars die
but all dead stars does not form black holes
some dead stars remain as nebula
and some become a small white dwarf
some black holes are formed when two
massive stars collide with each other
because like planets rotate around the
Sun stars are also rotating around our galaxy
so there is a chance to collide while rotating
Einstein was the first person
who predicted the existence of black holes
in 1960 later Stephen Hawking proved the
existence of black holes then he
introduced concept on black holes called
Hawking radiation black holes have
different kinds of temperature in
different parts they are very hot from
outside and freezing cold inside the black hole
you must be feared when you think about because it may swallow our
earth also
but don't get feared the nearest black
hole to our earth is thousand light years away
so it is not possible to come
near to our earth
all the black holes till known are heavier than our Sun the
heaviest black hole till now known to
scientists is m87 it's mass is 2 into 10
power 30 kilograms the lowest mass known
black hole in our universe is XTE J1650-500
it is the lightest to Blackhole it is
only three point eight times heavier
than our Sun if we talk about black
holes there is a movie called
interstellar which explains about black
holes on the day of April 10th 2019
after five days of research it's a
further step in science with the help of
telescopes called event horizon
telescope we took the real picture of
black hole for the first time the name
of this black hole is POWEHI
meaning of POWEHI is attractive dark
source of unending creation
If two blackholes collide it results in a massive
black hole but it's mass is somewhat
less when we compare with addition of
two black holes because it's mass is
released in the form of gravitational
energy
according to Hawking radiation black
holes will also die due to rotation and
continuous emitting of radiation they
lose their mass due to these two activities and
they begin to evaporate
in this way
black holes die if we want to escape
from the black hole we have to travel at
a speed more than light means at the
speed of 29 crores 97 lakhs 92,000
458 meters per second but in our present
technology we cannot travel faster than
light
the first black hole was formed
within the 800 million years after the
Big Bang
but our solar system formed after 9
billion years after Big Bang
So blackholes are very older than our solar
system
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