[VladRussian]

yes, we are trying to estimate the behavior, mass, luminocity, etc... of the objects in the Universe that was several times smaller than it is now, ie. the space itself was much more "dense" (for lack of a better word) and the matter "warmer" - was the Universe behaving like it does today? We know that the fundamental forces behave differently ( at least quantitatively-wise ) when the matter is "hot". So our estimations may be several orders of magnitude wrong, and finds such as this help to adjust our theories and estimates.