Astronomy Picture of the Day

Explanation: It is everywhere but nobody knew why. In every direction at all times, the sky glows in X-rays. The X-ray background phenomenon was discovered over 35 years ago, soon after the first X-ray satellites were launched, and has since gone unexplained. Yesterday results were released using data from the recently launched Chandra X-Ray Observatory that appears to have resolved much of this mystery. The above photograph shows that about 80 percent of the apparently diffuse hard X-ray background can be resolved into very many very faint sources. The new question is now what are these sources? Early speculation, much of which predates these observations, holds that many of these sources are the active centers of distant galaxies, probably involving massive black holes. Still other sources may be of origins currently unknown.

          Certas galáxias observadas  estão a aproximadamente 30 000  km/s , apenas um décimo da velocidade da luz !!
                             .....estão sendo tragadas (aceleradas)  por alguma massa de proporções inconcebíveis ,
                                                      situada em regiões Além  do Universo conhecido ,
                             .....pois se não fosse assim , seriam tragadas de volta para o nosso universo conhecido !!

                                                          http://www.astro.ucla.edu/~wright/cosmo_01.htm