M51 Whirlpool Galaxy Redux

The M51 Whirlpool Galaxy (NGC 5194) and its companion galaxy NGC 5195 in the constellation Canes Venatici. Distance is 23 million light-years.

Shot 24 May 2009; Rock Springs Parking Lot, Mt. Tamalpais State Park, California; ISO 800, Exp 23x2.5m, f/5.2, Canon EOS 5D & Televue NP127is. Calibration, alignment, & stacking with Images Plus 3.0; other post-processing with Photoshop CS4.

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