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Mike and Trish Berthon-Jones Astrophotography at Placidus Observatory
Astrophotography
Clusters
Something to snap in just a few minutes between clouds. Eight of these
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MikeBerthonJones
on August 13, 2021Crackerjack globular cluster M22 in Sagittarius. RGB 7 x 5 min per channel.
Many folk post globulars as a beautiful blue, but, at 10 billion years of age, that is impossible. Only small, cool, red stars can last that long. The smattering of blue stars are due to collisions. FLI PL16803 on 20 inch PlaneWave.