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Science 24 November 1995:
Vol. 270. no. 5240, pp. 1295 - 1296
DOI: 10.1126/science.270.5240.1295
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Research News

Ann Finkbeiner

The battle over the Hubble constant, the rate at which the universe is expanding, has raged for decades, fueled by the difficulty of measuring cosmic distances. One camp favored an expansion rate that implies an aged universe, the other a rate that implies a universe seemingly younger than the oldest stars. Supernovas may finally be breaking the impasse by giving astronomers a trustworthy "standard candle"--an object whose faintness is a true indicator of distance. They put the cosmos in comfortable middle age.




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