M51: Whirlpool Galaxy Published December 12, 2014 at 1000 × 631 in M51: Whirlpool Galaxy M51: Whirlpool Galaxy Image & Equipment Details: Date: 4/19/14 Calibrated with bias, flat, and dark frames Processed in PixInsight Temp: -30C Imaging Scope: Explore Scientific 127CF Apochromatic Triplet Imaging Camera: SBIG STF-8300M Annotated Image: