Video Karl Gebhardt, HETDEX Project Scientist, explains how a McDonald Observatory telescope will look for dark energy. Play video |
GlossaryVacuum energy 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 cosmological constant, 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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