Kind: captions
Language: en
an international group of astronomers
have announced a hint that could
fundamentally change what we know about
the universe and how we think it might
come to an end the group is using the
dark energy spectroscopic instrument or
desie to create a 3D map tracking the
movements and positions of 40 million
galaxies going back 11 billion years so
we can now get not just a map of where
stuff is at any moment we can actually
play a a movie and say space was
stretching this fast then this fast
later this fast now it's early days but
to their surprise their 3D map does not
align with theoretical maps of where
galaxies are supposed to be the culprit
might be dark energy dark energy is one
of the uh invisible entities that
actually fundamentally shaped the
universe scientists believe it plays a
major role in the expansion of the
universe there's this tantalizing clue
after this amazing amount of work
collecting light from all these objects
in the sky it looks like there really
might be a change in dark energy over
time in 1998 two independent groups of
astronomers discovered that Not only was
the universe expanding it was expanding
faster and faster and therefore in order
to accelerate the universe some kind of
energy is required and that was what was
dubbed as dark energy we don't know what
it is we don't know its properties we
don't know why it's there we know
there's a lot of it not only does Desi's
3D map takes sensus of how many galaxies
there are and how they're moving but it
also allows astronomers to to start
asking new questions about dark energy
right now it's estimated that dark
energy makes up about 70% of our
universe the remaining 25% being slow
moving exotic particles known as cold
dark matter and everything else that is
the normal matter and energy we
understand is just about 5% of the total
inventory of the universe and for
decades researchers have assumed that
dark energy is constant if Dark Energy
was just this constant then the fate of
the universe uh was kind of grim would
be a very sad lonely desolate Universe
because the distances between galaxies
would keep growing with time to a point
where billions and billions of years
later you wouldn't see any nearby
galaxies but the data from Desi suggests
that Dark Energy may actually be
decreasing over time it is the nature of
dark energy that determines the ultimate
fate of the universe and that's why this
is exciting and so opening the door to
the Poss ability of changing Dark Energy
models mean that we have more exciting
Fates that await
us but the first hint that maybe dark
energy is even more complicated as a
physical phenomenon so it really forces
us to to to continue to Grapple
hopefully with even more imagination uh
and and maybe new insights about
literally what what's filling the
universe