Intergalactic Missing Mass Missing Again

Ponca City, We Love You writes "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 mass of the universe as much as ten to 20 percent lighter (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 mass and gravity needed to hold together galaxies, 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."

Comments

Re:Bias in Physics?

[phliar]

What's easier to believe...

Science is not based on what's easier to believe.

Puny human! Your intuition is no good to reason with about the very small, very fast etc. Are you a practicing physicist? No? In that case I hope you'll forgive those of us that are willing to take the word of of physicists. And that word is that today GR is the best theory of gravity we have.

To this non-physicist, MOND looks just like string theory -- New! Exciting! but no real predictions, just lots of knobs you can twiddle to get any result you want.