Video A video introduction to dark energy, narrated by StarDate's Sandy Wood - Play video |
GlossaryCosmological Constant A possible explanation for dark energy. First proposed by Albert Einstein to bring his equations into balance with the then-observed universe, it proposes that space itself produces a form of energy, known as the vacuum energy, that causes the universe to accelerate faster as it ages. Current models show that the observed dark energy is far too weak to be accounted for by theories of the cosmological constant. |
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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), and Max-Planck-Institut fuer Extraterrestrische Physik. 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.
