00:00between every star in the night sky there is silence not just quiet something deeper
00:09an emptiness so vast that light itself struggles to cross it
00:15but here's the part most people never think about
00:18that silence is not actually empty when you look up at the stars it feels like they're scattered
00:27across a dark empty background like points of light on a blank canvas but that darkness between them
00:37isn't nothing it's space and space is filled with things we cannot see particles radiation fields
00:50and something far stranger because if you could zoom into the space between stars closer
01:00and closer you wouldn't find emptiness you would find a hidden structure
01:11floating between stars are clouds of gas hydrogen helium the basic building blocks of everything
01:22these clouds stretch across light years some are so massive they will eventually collapse under their
01:30own gravity and form new stars so the space between stars is not just space it's where stars are born
01:43but even that isn't the full picture because most of what exists between stars is something we still
01:51don't understand scientists believe that visible matter stars planets gas makes up only a small
02:01fraction of the universe the rest is something invisible something we cannot see something that doesn't emit
02:11light light they call it dark matter it doesn't shine it doesn't interact with light
02:21but it has mass and it shapes the structure of entire galaxies
02:27which means even the empty space between stars is filled with something we can't detect directly
02:37so the next time you look at the night sky remember this
02:42you are not looking at emptiness you are looking through something
02:49and it gets even stranger even if you removed every particle every atom every trace of matter from space
02:59it still wouldn't be empty because at the smallest scales of reality
03:05space itself is not truly still quantum physics tells us that even a perfect vacuum is filled with fluctuations
03:15tiny bursts of energy appearing and disappearing constantly particles that exist for a fraction of a second
03:22then vanish so even nothing is doing something which leads to a strange idea
03:32there is no such thing as true emptiness every part of the universe is active alive with motion
03:43even when it looks completely still and that silence between stars
03:48it's not quiet because nothing is happening it's quiet because what's happening is beyond what we can hear
03:58between stars there are invisible forces shaping galaxies there are particles drifting across unimaginable distances
04:07there are fields fluctuations structures we are only beginning to understand
04:15entire process is unfolding in complete silence
04:21and we pass through at every second without ever noticing so the next time you look up at the night
04:28sky
04:29don't just look at the stars look at the darkness between them
04:35because that darkness is not empty it's filled with the unknown and it may be one of the most active
04:43places
04:44in the entire universe the universe is not silent we just don't know how to listen
04:52you
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