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MEASURING THE HUBBLE CONSTANT WITH THE HUBBLE SPACE TELESCOPE†

Published online by Cambridge University Press:  01 November 2009

W. L. Freedman ,
R. C. Kennicutt  and
J. R. Mould
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Abstract

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Ten years ago our team completed the Hubble Space Telescope Key Project on the extragalactic distance scale. Cepheids were detected in some 25 galaxies and used to calibrate four secondary distance indicators that reach out into the expansion field beyond the noise of galaxy peculiar velocities. The result was H0 = 72 ± 8 km s−1 Mpc−1 and put an end to galaxy distances uncertain by a factor of two. This work has been awarded the Gruber Prize in Cosmology for 2009.

Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 5 , Highlights H15: Highlights of Astronomy , November 2009 , pp. 1 - 16
Copyright
Copyright © International Astronomical Union 2010

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