They just got a different tool to use than we do: They kill innocent lives to achieve objectives. That's what they do. And they're good. They get on the TV screens and they get people to ask questions about, well, you know, this, that or the other. I mean, they're able to kind of say to people: Don't come and bother us, because we will kill you. Bush - Joint News Conference with Blair - 28 July '06

Saturday, May 19, 2007

Hubble Finds Ring of Dark Matter


This Hubble Space Telescope composite image shows a ghostly "ring" of dark matter in the galaxy cluster Cl 0024+17.

The ring-like structure is evident in the blue map of the cluster's dark matter distribution. The map is superimposed on a Hubble image of the cluster. The ring is one of the strongest pieces of evidence to date for the existence of dark matter, an unknown substance that pervades the universe.

The map was derived from Hubble observations of how the gravity of the cluster Cl 0024+17 distorts the light of more distant galaxies, an optical illusion called gravitational lensing. Although astronomers cannot see dark matter, they can infer its existence by mapping the distorted shapes of the background galaxies. The mapping also shows how dark matter is distributed in the cluster. Link