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NGC 1532 in Eridanus. A tidally interacting pair of galaxies.
Note the bright blue streaks and dots - OB associations - in the spiral arms, resolved into individual dots in the faintest parts of in the outermost tidal tails.
Field approx half a degree. 0.55 sec arc/pixel.
Lum: 12 hrs; RGB 2 hrs each, all in 30 min subs. Aspen CG16M on 20" PlaneWave. Processing mostly with GoodLook 64. Some cosmetic repairs of reflections from upsilon 4 eridani using PhotoShop CS5.
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