Kind: captions
Language: en
back in 1998 scientists were trying to
figure out what's the fate of the
universe the question LED them to one of
the biggest discoveries of the last 50
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years here's what they wanted to know
the universe is expanding now but will
it keep on going or will gravity slow it
down and make it shrink crushing
everything in the universe astronomers
looked at extremely far away but very
bright objects called supernovas to find
out how fast different parts of theit
Universe were expanding the results were
shocking and my jaw just dropped the
farthest away supernovas they tracked
were moving faster than they expected
they realize the universe is not just
expanding it's accelerating in its
expansion something weird and mysterious
must be stretching empty space apart and
they call that thing dark energy and it
seems like the more empty space there is
the more Dark Energy there is which
creates more empty space which creates
more dark energy and on and on and on
and on and on
right now Dark Energy makes up about 70%
of the Universe And scientists still
don't know exactly what it is but what
we do know is that the bigger the
universe gets the faster it expands and
someday far in the future space will
expand so much that scientists in one
Galaxy will never be able to see
extremely distant galaxies like we do
today the universe will be expanding
faster than the speed of light so the
light from those very distant galaxies
will never reach each other luckily we
still live in a time when we can see
extremely distant galaxies and their
exploding stars and learn about dark
energy
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