Latest Dark matter halo Stories

hypervelocity star
2014-05-08 04:44:08

John P. Millis, Ph.D. for redOrbit.com - Your Universe Online Most stars move around the galaxy in well-defined orbits, pulled under the influence of the Milky Way’s gravity. It is the predictable motion of the stars around the Milky Way’s supermassive black hole core that gives the galaxy its spiral structure. There are, of course, deviations from the norm, but on average the stars move at a leisurely pace of roughly 500,000 miles per hour. But this is not always the case. In...

Spiral galaxy top view
2011-08-29 11:32:12

  Researchers at the University of California, Santa Cruz have used a supercomputer to create a spiral galaxy that matches our own Milky Way galaxy. The computer simulation is part of a physics project involving galaxy formation and evolution. "Previous efforts to form a massive disk galaxy like the Milky Way had failed, because the simulated galaxies ended up with huge central bulges compared to the size of the disk," Javiera Guedes, a graduate student in astronomy and...

2006-07-03 10:28:07

Rare Blob Unveiled: Evidence for Hydrogen Gas Falling onto a Dark Matter Clump? ESO's VLT has helped scientists to discover a large primordial 'blob', more than 10 billion light-years away. The most likely scenario to account for its existence and properties is that it represents the early stage in the formation of a galaxy, when gas falls onto a large clump of dark matter. Over the last few years, astronomers have discovered in the distant Universe a few so-called 'blobs'. These are rather...

2005-04-07 15:50:00

RAS -- Scientists from the University of Durham may have solved a decades-old puzzle regarding the distribution of the eleven small satellite galaxies that surround the Milky Way. The Milky Way is not alone. It is surrounded by a retinue of small "dwarf galaxy" companions. Cosmological theory predicts that these galaxies should occupy a large, nearly spherical halo but observations show that the satellite galaxies have a bizarre flattened, pancake-like distribution. The Durham team used...

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