The subexposures for this stacked image were taken with LRGB filters. The total exposure time was about 25 hours with the Celestron 11 inch telescope. From Wikipedia: “The Whirlpool Galaxy, also known as Messier 51a, M51a, or NGC 5194, is an interacting grand-design spiral galaxy with a Seyfert 2 active galactic nucleus in theContinue reading “Whirlpool Galaxy – Color”
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Astro La Vista Observatory 