Belogradchik Observatory
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Gérard de Vaucouleurs
Gérard
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Jacques Vallée
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Davies (crater)
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Messier 108
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Messier 77
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List of eponymous laws
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SN 1885A
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Galaxy morphological classification
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William Wilson Morgan
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Black Eye Galaxy
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Supergalactic coordinate system
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1918 in science
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List of craters on Mars: A–G
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Messier 87
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Triangulum Galaxy
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Patrick Moore
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Virgo Supercluster
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University of Paris
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List of astronomers
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Timeline of knowledge about galaxies, clusters of galaxies, and large-scale structure
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Hubble sequence
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Hubble's law
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Galaxy
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Edwin Hubble
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April 25
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Gerard de Vaucouleurs
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Gerard Henri de Vaucouleurs
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Gérard Henri de Vaucouleurs
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De Vaucouleurs
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