How to pronounce "luminous"

Most of the stuff which fills our universe is completely invisible to us.

Visible matter,

the kind that we and the stars are made from,

the kind that radiates light, is not what's normal.

The majority of the energy-matter content in the universe

is something that we call dark energy.

After dark energy, the second-largest ingredient

is something that we call dark matter.

It gravitates exactly like visible matter.

But it's completely unlike us in every other way.

We believe that 80 percent of the normally gravitating matter in the universe

is dark matter.

We believe that every single galaxy, or almost every single galaxy,

lives inside of a dark matter halo.

And at least, at first approximation,

light seems to go right through it, so we can't see it.

It's invisible, maybe transparent, maybe clear.

And we, the luminous matter, we are the cosmic weirdos.