Video H.E.T. PFIP Removal - Play video |
GlossaryGravity One of the four fundamental forces in the universe, it is a property of matter that "warps" the space around it, causing an attraction between two objects. The magnitude of gravitational attraction depends directly on mass and inversely on distance squared. In other words, if you move twice as far from an object, its gravitational pull on you will be only one-fourth as strong. Gravity was a more dominant force in the early universe, since the universe was smaller and there was less distance between objects. As the universe has expanded, dark energy appears to have become more dominant, pushing the galaxies apart at a faster rate. |
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Copyright ©2008-2015 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 für 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.
