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NGC 7814 background objects magnitude estimation. Red on stars, from USNO A2.0 Catalogue (thanks to Lorenzo Comolli), Blue on galaxies, from Sloane Digital Survey (thanks to Gimmi Ratto). |
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NGC 7814 background objects magnitude estimation. Red on stars, from USNO A2.0 Catalogue (thanks to Lorenzo Comolli), Blue on galaxies, from Sloane Digital Survey (thanks to Gimmi Ratto). |