Fundamental to the structure of the universe is the existence of dark matter and dark energy.

Thus, dark matter is estimated to constitute 84.5 of the total matter in the universe, while dark energy plus dark matter constitute 95.1 of the total mass energy content of the universe.

So in terms of the big questions what is dark matter? What is dark energy?

So in terms of the big questions what is dark matter?

We call that stuff dark matter.

So this is the closest you can get to kind of seeing at least the effects of the dark matter with your naked eye.

Dark matter is invisible matter. If I held it in my hand, it would go right through my hand. It holds the galaxy together 23 of the universe is dark matter.

That stuff is called dark matter.

Dark matter now placed against a horizon.

So dark matter has gravitational attraction, but it is invisible and we are clueless as to what dark matter really is.

Dark matter is invisible, so if I held it in my hand you wouldn't see it.

Patricia Burchat sheds light on dark matter

Such rings help in understanding the distribution of dark matter, dark energy, the nature of distant galaxies, and the curvature of the universe.

And there's a whole shelf full of Nobel Prizes for the young people who can figure out the secret of dark matter and dark energy.

And, among other things, they're looking for dark matter.

And finally, for future endeavors, there are telescopes being designed specifically to address the questions of dark matter and dark energy ground based telescopes, and there are three space based telescopes that are in competition right now to be launched to investigate dark matter and dark energy.

So for now, let's turn to the evidence for dark matter.

It is possible that dark matter particles might be produced at the Large Hadron Collider.

This dark matter can be envisioned as a cloud which surrounds most galaxies.

Now, so at this point, then, what I want to really emphasize to you, is that, first of all, dark matter and dark energy are completely different things, OK.

In terms of dark matter, I said that we don't have any, you know, really persuasive argument for dark energy.

The discovery of dark matter took us one step further away from the center of things.

Going way out, dark matter conforms to the same mycelial archetype.

There is another way to search for dark matter, which is indirectly.

Now, what is dark matter, which makes up 23 of the universe.

like dark energy and dark matter this equation describes, seems to describe everything about the universe and what's in it.

Today, scientists believe that the answer lies in a previously unknown kind of matter, called dark matter.

The name dark matter originates in this form of matter's inability to emit or absorb light.

In that case it is a WIMP and a candidate for dark matter.

Dark matter, because it gravitationally attracts, it tends to encourage the growth of structure, OK.

Because dark energy, unlike matter or radiation, does not dilute away as the universe expands.

Maybe all the action takes place inside the mysterious recently discovered dark matter, or dark energy, that appear to account for most of the universe's mass.

Maybe all the action takes place inside the mysterious recently discovered dark matter, or dark energy, that appear to account for most of the universe's mass.

23 is dark matter, which we think is the next vibration up of the string and then 73 of the universe is dark energy.

Physicist Patricia Burchat sheds light on two basic ingredients of our universe dark matter and dark energy. Comprising 96 of the universe between them, they can't be directly measured, but their influence is immense.

And finally, for future endeavors, there are telescopes being designed specifically to address the questions of dark matter and dark energy ground based telescopes, and there are three space based telescopes that are in competition right now to be launched to investigate dark matter and dark energy.

Dark matter adds to the gravity of the galaxy and explains the orbital speed of stars far from the galactic center.

From these figures, matter accounts for 31.7 of the mass energy content of the universe, and 84.5 of the matter is dark matter.

According to the Planck mission team, and based on the standard model of cosmology, the total mass energy of the known universe contains 4.9 ordinary matter, 26.8 dark matter and 68.3 dark energy.

Now, suppose I put in the middle a cluster of galaxies and don't forget the dark matter, OK.

But we don't know if either of those are actually the dark matter candidate, OK.

The best evidence for dark matter today comes from measurements of something called the cosmic microwave background, the afterglow of the Big Bang, but that's another story.

All of the evidence we have says that dark matter is there and it accounts for much of the stuff in those beautiful spiral galaxies that fill the heavens.

Dark City

What are you doing? Teach a woman to read.