Dark matter is now understood to fill what would otherwise be considered to be empty space.

'Cosmologists at Penn Weigh Cosmic Filaments and Voids'
http://www.upenn.edu/pennnews/news/cosmologists-penn-weigh-cosmic-filaments-and-voids

"Dark matter ... permeates all the way to the center of the voids."

'No Empty Space in the Universe --Dark Matter Discovered to Fill Intergalactic Space'
http://www.dailygalaxy.com/my_weblog/2012/02/no-empty-space-in-the-universe-dark-matter-discovered-to-fill-intergalactic-space-.html

"A long standing mystery on where the missing dark matter is has been solved by the research. There is no empty space in the universe. The intergalactic space is filled with dark matter."

Dark matter which fills the space unoccupied by particles of matter is displaced by the particles of matter which exist in it and move through it.

What is referred to as frame dragging in the following video is the state of displacement of the dark matter. Watch the video starting at the 0:30 mark to see a visual representation of the state of displacement of the dark matter.

(video doesn't always apper. The video is: youtubecom/watch?v=s9ITt44-EHE)

http://www.nasa.gov/mission_pages/gpb/gpb_results.html

"Imagine the Earth as if it were immersed in honey. As the planet rotates, the honey around it would swirl, and it's the same with space and time," said Francis Everitt

Honey has mass and so does dark matter. The swirl is the state of displacement of the dark matter.

'The Milky Way's dark matter halo appears to be lopsided'
http://arxiv.org/abs/0903.3802

"the emerging picture of the dark matter halo of the Milky Way is dominantly lopsided in nature."

The Milky Way's halo is lopsided due to the matter in the Milky Way moving through and displacing the dark matter, analogous to a submarine moving through and displacing the water.

The Milky Way's halo is the state of displacement of the dark matter.

The Milky Way's halo is curved spacetime.

What is referred to geometrically as the curvature of spacetime physically exists in nature as the state of displacement of the dark matter.

The state of displacement of the dark matter is gravity.

Our Universe is a larger version of a galactic polar jet.

Our Universe is a larger version of one of the following.


​​​From: Black Hole Active Galaxies and Quasars


​​From: Page on nrao.edu

Matter is moving outward and away from us in three dimensional space.

Dark energy is dark matter continuously emitted into the Universal jet.

It's not the Big Bang, it's the Big Ongoing.