... Rumors of a Strange Universe . ... NASA Explanation: Only a few short years ago , when the APOD editors were in graduate school, the pervasive, cosmic Dark Energy was not even seriously discussed. Of course, it now appears that this strange energy dominates the cosmos (as well as lectures on cosmology ) and provides a repulsive force accelerating the large scale expansion of the Universe . ... NASA Official: Jay Norris. ... Publications with keywords: supernova - cosmology - dark energy . ...