Fired Up About Dark Matter | StarTalk

hi number two this next question is from
okay let’s see this is uh this is from
David Crosby oh okay and in his
interview with you anyway he was asking
me questions well he well mucinous Utes
you clipped a question I clipped a
question and he was very fired up about
it so let’s see what alright what the
hell what what I totally don’t
understand what dark energy or dark
matter are why you’d like you sounded
angry with me know this stuff and I how
else I got to ask okay so I’m happy to
answer that question we have no idea
Wow next question we do not know what
dark matter is it probably is probably
miss named I know what it is it’s buck
sorry what it should have been called is
dark gravity there’s gravity in the
universe we have no idea what’s causing
it if you say dark matter that implies
it’s matter but we don’t even know if
there is or is not that but we do know
it is gravity with no known source so
it’s dark gravity we can see it’s
gravity we don’t know anything else
about it we can’t see it we can taste it
we can’t touch it our light doesn’t
interact with it it doesn’t make spectra
we are clueless same goes for dark
energy dark energy a mysterious pressure
in the vacuum of space that is pressing
against the fabric of the universe
making it accelerate in its expansion
against the gravitational wishes of the
galaxies it contains we are deeply
steeped in this ignorance you combine
dark matter and dark energy it is 96% of
all that drives the universe and all we
really have command of is that remaining
4% all the known laws of physics can
geology are in those 4%