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Science 15 September 2000:
Vol. 289. no. 5486, pp. 1888 - 1889
DOI: 10.1126/science.289.5486.1888
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Perspectives

ASTRONOMY:
Don't We Already Know Everything About Polaris?

Nancy Remage Evans

Recent results on Polaris and other Cepheids, variable stars used as a yardstick for astronomical distances, illustrate some of the new capabilities we have for studying this important class of stars. In her Perspective, Evans charts some of the recent work and highlights some of the surprises that have been revealed, even in objects thought to be basically understood.

The author is at the Harvard Smithsonian Center for Astrophysics, Cambridge, MA 02138, USA. E-mail: evans{at}head-cfa.harvard.edu

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