Video H.E.T. PFIP Removal - Play video |
GlossaryExpanding universe The universe is expanding as a result of the Big Bang. The rate of expansion has varied. Evidence shows that until about five billion years ago, the expansion was accelerating but at a slowly decreasing rate. Since then, the acceleration has increased, perhaps as a result of dark energy. |
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Copyright ©2008-2013 McDonald Observatory. HETDEX is a collaboration of The University of Texas at Austin, Pennsylvania State University, Texas A&M University, Universitats-Sternwärte Munich, Leibniz Institute for Astrophysics (AIP), Max-Planck-Institut fuer Extraterrestrische Physik, Institut für Astrophysik Göttingen, and University of Oxford. Financial support is provided by the State of Texas, the United States Air Force, the National Science Foundation and the generous contributions of many private foundations and individuals.
