Known among astronomy enthusiasts as the Great Globular Cluster in Hercules, this gem has no rivals in the Northern Hemisphere. Omega Centuri, another globular is more spectacular, but it is low in the Southern horizon and not visible from my urban location.
M13 consists of hundreds of thousands of stars densely packed. In this cropped image, M13 is shown as the composite of 11, 6-minute frames taken through my 130mm astrograph with a quad-narrow band filter the night of 05/25/22. Such filters are best used on nebulae, but here I have attempted to use the filter to reject light pollution more effectively than a standard light pollution filter. The first image is a cropped version of the 130mm astrograph’s field that appears in the second image.
My physician colleague, AD Smith, referred me to Azimov’s story Nightfall a year or two ago when I posted this or perhaps another globular cluster image. I had not previously read that story, and I tracked it down. The link appears above in story’s name. I recommend it, and I hope that you enjoy it as much as I did. Thanks, AD.
