I cannot get to the original Science publication to cite it. Science Now has a précis: http://www.latimes.com/science/scie...ight-background-ebl-ciber-20141106-story.html So the information below is not firsthand. The claim is that one half of all stars are rogue stars, which are stars which well out into a very large, faint halo around galaxies. The article mentions that previously about 5% of all stars were thought to fall into this category. It goes on saying that this finding, if validated, would cause researchers to revisit models of galactic formation. Question: why would that cause reevaluation - a lot more previously unaccounted for mass? Does this finding have the potential to invalidate existing estimates of galactic mass? Thanks for any comments.