In a paper to be published in the Astrophysical Journal, Riess and his collaborators have made the first meaningful measurement of the second property, its permanence. When astronomers first realized the universe was accelerating, the conventional wisdom was that it would expand forever. In the process, they discovered 42 new supernovae in the GOODS area, including 6 of the 7 most distant known. 16, 2004. This looks like the least likely scenario at present," says Riess. Dark matter is an invisible form of mass that comprises most of the matter in the universe. This increase in galaxy size is consistent with "bottom-up" models, where galaxies grow hierarchically, through mergers and accretion of smaller satellite galaxies. An alternative possibility is that dark energy is associated with a changing energy field dubbed Discount Lorazepam This field would be causing the current acceleration — ... Read more »