Hubble reveals where Dark Matter exists. Hubble: The Ultimate Telescope, 2010
There’s something that fills space and counteracts the pull of ordinary attractive gravity. Brian Greene, Beyond the Cosmos, National Geographic 2012
It’s a dark matter asteroid. Star Trek: Voyager: One Small Step s6e8, B’Elanna on bridge
That means there is more matter than we have so far found. At least about ten times more matter. Matter which is so far unseen and undetected. Professor Alan Guth
If the universe continues to expand for ever, everything will burn out and decay. The amount of matter we observe in the stars and gas clouds is only about 10% of what is required to stop the expansion of the universe and cause it to collapse again. However, there might be other dark matter that we can’t see which will still affect the expansion of the universe. Professor Stephen Hawking
It seems that the kind of matter of which we are made accounts for only a small fraction of the universe. Over 90% is something we cannot even see. Dark matter. Stephen Hawking’s Universe: Seeing is Believing, BBC 2002
[Vera] Rubin’s findings suggested that the destiny of galaxies is governed by a vast and inscrutable network. Every galaxy is enveloped in dark matter, invisibly locking all the stars in its embrace with the gravity it exerts. The black emptiness of space it seems isn’t so empty after all. 99% of the universe could well be made up of dark matter. A sprawling cosmic web. Stephen Hawking’s Universe: On the Dark Side
Dark matter determines that fate of the universe. ibid.
The neutrino: this is produced in atomic bomb explosions, so it would also have been produced in the Big Bang explosion. If it had a tiny mass of its own, it could be the dark matter. ibid.
There are two possibilities: if there is only a fairly small amount of dark matter, the universe will continue to expand for ever, getting colder and colder, and more and more empty; on the other hand, if there’s a lot of dark matter, gravity will slow down the expansion of the universe, and stop it eventually. Then the universe will begin to contract and will end up in the Big Crunch like the Big Bang in reverse. ibid.
We think that Dark Matter was created out of the Big Bang. And Dark Matter began to clump, and these clumpings of Dark Matter eventually became the nuclei, the seeds for our galaxy. Professor Michio Kaku
The only way to resolve this paradox and the galaxies that spin too fast is to assume that there is a halo, a halo of invisible matter surrounding the galaxy, keeping the galaxy whole. Professor Michio Kaku
If I had some dark matter in my hand, it would have weight. But first it would dissolve right through my fingers. Professor Michio Kaku
Massive Dark Matter halos are clearly detected in disc galaxies, so where did they disappear to during the mergers? Avishai Dekel
People who deal with Dark Matter do not stop by themselves. They stop when the money stops. This is what they do. This is what they know how to do. And this is what they want to continue to do. Professor Mordehai Milgrom, Weizmann Institute Israel
Dark Matter and Dark Energy combined make up 96% of the universe ... Dark Matter’s invisible presence appears to be everywhere. But Science has not directly proven Dark Matter particles exist. There are many theories but no answers. And observing something you can’t see isn’t easy. The Universe s2e6: Dark Matter/Dark Energy, History 2007
It’s estimated Dark Matter makes up 23% of the universe. While ordinary matter makes up only 4%. But what makes up the final 73% of the universe? Scientists have proposed that a new mysterious Dark Energy is dominating space, and its repulsive energy is driving the galaxies apart ... Scientists were shocked to realise that its growth wasn’t slowing down: it was speeding up. This implied a bleak future. ibid.
Scientists know Dark Matter must exist because they see its gravitational effect. Without Dark Matter the stars in the outer reaches of a galaxy would fly off into intergalactic space. In other words the Dark Matter is playing a crucial role in holding the galaxy together. Extreme Universe: Edge of Space, National Geographic 2010
A maverick scientist came up with the idea that something else was at work. Back in the 1930s Swiss astronomer Fritz Zwicky wondered why galaxies stayed together in groups. How the Universe Works s1e3: Galaxies, Discovery 2010
It’s clear now that Dark Matter is a vital ingredient of the universe. It’s been working since the dawn of time. And affects everything, everywhere. It triggers the birth of galaxies. And stops them from falling apart. We can’t see it or detect it. Nevertheless, Dark Matter is the master of the universe. ibid.
Each of the filaments is home to millions of galaxy clusters. All bound together by Dark Matter. ibid.
Dark Matter holds together the whole super-structure of the universe. It binds galaxies in clusters. And clusters in super-clusters. All these are locked together in a web of filaments. Without Dark Matter the whole structure of the universe would simply fall apart … It’s a giant cosmic web. ibid.
Dark Energy has the opposite effect of Dark Matter. Instead of binding galaxies together it pushes them apart. ibid.
In the 1970s astronomers were completely stunned … the galaxies were spinning too fast, far too fast … nine-tenths of their mass was missing … they called it dark matter … Astronomers have mapped out the distribution of dark matter using gravitational lensing … Dark matter fills the universe. How the Universe Works s3e2: The End of the Universe
The acceleration baffled the scientists … The new energy seemed to be coming from nothing … dark energy. ibid.
The universe will end in one of two ways: the Big Rip or the Big Freeze. ibid.
So when did dark energy begin to control the universe? ibid.
As space expanded, dark energy increased in comparison with it. ibid.
The universe is heading for a Big Freeze. ibid.
There’s something else out there, something strange: invisible dark matter also fills our universe and it could be the key to the existence of everything. How the Universe Works s5e8: The Dark Matter Enigma
Most scientists believe dark matter is a type of elementary particle and it lurks in vast networks of clouds or networks that link the two trillion galaxies that form our universe. ibid.
The universe we see today: 84% dark matter and just 16% ordinary matter. ibid.
The stars of the galaxy appear to be fixed almost as if they’re attached to the giant spinning wheel. ibid.
We know dark matter is out there … The primary candidate is a theoretical particle known as a WIMP. ibid.
Across the universe an endless war rages. A bitter struggle between invisible forces. Dark matter and dark energy. Battling for control of the universe. Shadowy forces dictating our past, our present and our future. How the Universe Works s7e7: Battle of the Dark Universe
What we see is just a small part of the cosmos. The rest is invisible, unknown. A dark universe. ibid.
‘Dark matter is attractive, dark energy is repulsive.’ ibid. scientist
Scientists believe there is a hidden substance deep in space. It keeps the cosmos running. But is that substance real? After searching for decades we still don’t understand this inexplicable substance. There’s evidence that dark matter makes up 85% of all the matter in the universe. How the Universe Works s10e5: Hunting for Dark Matter
Dark matter can also bend light itself. It’s called gravitational lensing. ibid.
The astronomers were in for a shock: our universe is not slowing down. It is speeding up. The Entire History of the Universe e9: Where Did Dark Matter & Dark Energy Come From?
And to account for this accelerated expansion there was something else in the universe. Something unexpected driving the cosmos faster and faster. ibid.
What are these new components of our universe? How do they work? And where did they come from? ibid.
Most of the matter in our universe is completely dark. ibid.
Where did all this cosmic structure come from?
The other dark component – dark energy … Just what was this new dark mysterious stuff of the universe?
This universal expansion is accelerating.
Dark energy made up the remainder – 70% of the universe. ibid.
Dark energy has a tension that pulls. ibid.
Cosmic Microwave Background: The detection of a mysterious anomaly sixty years ago was able to take us right back to the beginning of the universe … Did the universe have a beginning. Universe Unravelled with the Stephen Hawking Centre s1e10: Black Holes and the Big Bang (short)
One of the darkest mysteries of the universe … we’ve only just begun to explore. Universe Unravelled with the Stephen Hawking Centre s1e11: Shining Light on Dark Matter (short)
What exactly is dark matter? We don’t really know yet. ibid.
What is the universe expanding into? ibid.
This extra gravitational effect comes from dark matter. Universe Unravelled with the Stephen Hawking Centre s1e16: Can We See Dark Matter? (short)
Cosmic pie: 69% dark energy, 26% dark matter, 5% ordinary matter. Universe Unravelled with the Stephen Hawking Centre s1e17: Cosmic Pies (short)
The next piece of the puzzle … Dark Energy and Dark Matter. Universe Unravelled with the Stephen Hawking Centre s1e22: Modified Theories of Gravity (short)