Hubble team discovers 'ring of dark matter'
16/05/2007

For decades, it has been the mysterious, invisible material that makes up most of the cosmos. Now, astronomers have produced the strongest evidence that “dark matter” really exists, after initially writing off the discovery as an error in their measurements.

A team using Nasa’s Hubble Space Telescope has discovered a ghostly ring of dark matter that formed long ago during a titanic collision between two clusters of galaxies.

It created a remarkably uncluttered picture of an elusive substance that was first postulated in 1933 and provides new opportunities to figure out what it is. Astronomers have long suspected the existence of the invisible substance as the source of additional gravity from “dark matter”. the rest