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Arp 147 - Wikipedia
Interacting Galaxies Arp 147 - HubbleSite
Interacting Galaxies Arp 147 | HubbleSite
APOD: 2008 November 4 - The Double Ring Galaxies of Arp 147 …
Chandra :: Photo Album :: Arp 147 :: February 9, 2011
Giant ring of black holes in Arp 147 | Astronomy.com
SWIFT observations of the Arp 147 ring galaxy system
Arp 147, Interacting Galaxies - astrophotopix.com
ESA - Interacting galaxies Arp 147 - European Space Agency