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Astrometry with the Hubble space telescope: trigonometric parallaxes of planetary nebula nuclei NGC 6853, NGC 7293, Abell 31, and DeHt 5

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Description scientific article published in Astronomical Journal
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author: Ralf Napiwotzki  Howard E. Bond  Robin Bruce Ciardullo  Richard J. Patterson  Edmund P. Nelan 

Publication date November 10, 2009
Language English
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