Damn that Intergalatic Missing Mass. And I get upset when I can't find my car keys....
[hr style="width: 100%; height: 2px;"][h3] Intergalatic Missing Mass Missing Again[/h3] Researchers at the University Of Alabama In Huntsville have discovered that some x-rays thought to come from intergalactic clouds of 'warm' gas are instead probably caused by lightweight electrons — leaving the [a href="http://www.sciencedaily.com/releases/2007/11/071102152248.htm"]mass of the universe as much as ten to 20 percent lighter[/a] (in terms of its ordinary matter) than previously calculated. In 2002 the same team reported finding large amounts of extra 'soft' (relatively low-energy) x-rays coming from the vast spaces in the middle of galaxy clusters.
Their cumulative mass was thought to account for as much as ten percent of the [a href="http://en.wikipedia.org/wiki/Missing_mass"]mass and gravity needed to hold together galaxies[/a], galaxy clusters, and perhaps the universe itself. When the team looked at data from a galaxy cluster in the southern sky, however, they found that energy from those additional soft x-rays doesn't look like it should. 'The best, most logical explanation seems to be that a large fraction of the energy comes from electrons smashing into photons instead of from warm atoms and ions, which would have recognizable spectral emission lines,' said Dr. Max Bonamente. The work was published Oct. 20 in the Astrophysical Journal.
