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Science 22 July 2005:
Vol. 309. no. 5734, pp. 564 - 565
DOI: 10.1126/science.1115128
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Perspectives

ASTRONOMY:
Mapping the Large-Scale Structure of the Universe

David H. Weinberg

Galaxies are not scattered about the universe in a random way, but rather form an intricate network of filaments, sheets, and clusters. How these large-scale structures formed is at the root of many key questions in cosmology. In his Perspective, Weinberg discusses two ongoing astronomical efforts--the Two-Degree Field Galaxy Redshift Survey and the Sloan Digital Sky Survey--that seek to map cosmological structures over an unprecedented range of scales. By making these ambitious measurements, researchers hope to understand phenomena such as dark energy, the inflationary expansion of the universe after the big bang, and the mechanisms of galaxy formation.

The author is in the Department of Astronomy, Ohio State University, 140 West 18th Avenue, Columbus, OH 43210, USA E-mail: dhw{at}astronomy.ohio-state.edu

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