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Science 4 October 1996:
Vol. 274. no. 5284, pp. 9 - 0
DOI: 10.1126/science.274.5284.9a
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This Week in Science

The distant observable universe takes the form of stars, galaxies, and clusters, but where has all the matter gone that was not used to form these large structures? Dodelson et al. (p. 69) review cold dark matter theory, which argues that the nucleosynthesis that formed ordinary baryonic matter after the initial rapid expansion of the universe still left the bulk of the universe as cold dark matter, which consists of small, slow-moving elementary particles that have not been detected yet but that may provide the gravity that holds the universe together. They discuss several cold dark matter models that are based on recent observations from the Cosmic Background Explorer, the Hubble Space Telescope, and several large sky surveys.




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Science. ISSN 0036-8075 (print), 1095-9203 (online)