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In pheesical cosmology an astronomy, daurk energy is a hypothetical furm o energy that permeates aw o space an tends tae accelerate the expansion o the universe.[1]

ReferencesEedit

  1. Peebles, P. J. E. and Ratra, Bharat (2003). "The cosmological constant and dark energy". Reviews of Modern Physics. 75 (2): 559–606. arXiv:astro-ph/0207347 . Bibcode:2003RvMP...75..559P. doi:10.1103/RevModPhys.75.559.