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May 7, 2009 09:00 AM (EDT)

News Release Number: STScI-2009-08

Refined Hubble Constant Narrows Possible Explanations for Dark Energy

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Image: HST ACS/WFC Image of NGC 3021

HST ACS/WFC Image of NGC 3021

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Object Name: NGC 3021

Image Type: Astronomical

Credit: NASA, ESA, and A. Riess (STScI/JHU)

NEWS RELEASE IMAGES

The above image is part of a montage:

Montage Image: Cepheid Variable Stars in Spiral Galaxy NGC 3021 Image Type: Astronomical/Illustration Cepheid Variable Stars in Spiral Galaxy NGC 3021PRC2009-08a NGC 3021 NICMOS/ACS Detail 1 Image Type: Astronomical NGC 3021 NICMOS/ACS Detail 1 NGC 3021 NICMOS/ACS Detail 2 Image Type: Astronomical NGC 3021 NICMOS/ACS Detail 2 NGC 3021 NICMOS/ACS Detail 3 Image Type: Astronomical NGC 3021 NICMOS/ACS Detail 3 NGC 3021 NICMOS/ACS Detail 4 Image Type: Astronomical NGC 3021 NICMOS/ACS Detail 4

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