One of the most mind-bending discoveries we've ever made in space is black holes
a black hole is a place in space where gravity pulls in so much that not even
light can escape the gravity is so strong because the mat has been squeezed
into a tiny space black holes can be caused when a star dies because no light
can escape this means they're totally invisible and black and of course they
suck in anything that goes anywhere near them so that begs the question what
would happen if two of these flat holes collided this actually can and does
happen but what happens when it does and what if it happened near to earth I'm
Charlie and today we're going to look at what if two black holes collided but
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black holes can be big or small but one of the most amazing kinds of black holes
are supermassive black holes these have masses which range from millions or
billions of Suns place it at the center of the most massive galaxies across our
universe and there are even some in our galaxy the Milky Way what's interesting
is right now we don't know how supermassive black holes come to be we
understand black holes but we don't know how supermassive black holes get so big
one theory is it could happen form a supernova a supernova is when a star
explodes blasting part of That star into space but let's say something very
unlikely happens and two black holes merge together this can sometimes happen
during a merger of galaxies this is something we do see in our universe but
thankfully our galaxy the Milky Way has not merged with another galaxy before if
two black holes collided they would release gravitational waves these would
be fluctuations in the fabric of space-time right now we can use
simulations to predict these merges scientists have seen that these emit
both gravitational waves and radiation that's because when the two black holes
collide interstellar gas prices from them this creates very hot radioactive
waves when the black holes fall towards one another they merge into one
this cosmic clash would be very bad for any surrounding planets if it happened
to knit worth then radiation could take out some of the human population it
would be like Chernobyl but in space and about 10 million times worse right
now we actually don't have the facilities to observe supermassive black
holes merging together scientists have simply used simulations to see what
would happen but we do have the technology to witness to normal black
holes merging together they can actually see what's happening inside these black
holes the human eye can't see a black hole because strong gravity pulls in all
of the light bird scientists can measure how strong gravity affects the stars and
gas around the black hole they study the Stars flying around or orbiting the
black hole and then work out what would happen from them they study the stars
flying around or orbiting the black holes and then using that data they work
out what's happening one theory is that if two big black holes merge together
this could make a supermassive black hole these are black holes which were
about ten times at the size of a normal black hole the reason why this may
happen is because you're adding gravity into more gravity it's kind of like the
video game agar dot IO if two worms collide they merge into one even more
powerful worm and that's kind of a great metaphor for black holes as they go
around galaxies zapping up anything near them but on that note what happens to
the matter which is dragged into a black hole where does it go and what happens
to it well to understand this you need to know what the event horizon is the
event horizon is the space where light can escape from the black hole's
gravitational field and a space where it can't so basically where the matter does
and doesn't exist simultaneously the matter in the event horizon becomes
isolated from the rest of time and space it effectively disappears from the
universe that we existed once inside the black hole the matter will be torn apart
into subatomic components if then becomes stretched and squeezed until it
becomes a part of the black hole and increases its size and that's how black
holes increase in size again kind of like the game agar dot IO so hopefully
now you understand a bit more about this mind-bending science humans know little
about it's kind of crazy to think black holes break the space-time continuum but
they do but now it's time to make your voice heard vote in the poll in the top
right corner if you had the chance to visit space would you go if you want
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