M15 Globular Cluster
Dense Cluster in Pegasus

Uploaded 10/15/12


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 Although I have imaged both digitally and on film nearly every emission nebula in the entire sky in both hemispheres many times over with instruments ranging from wide angle lenses to 16 inch behemoths, I have spent nearly no time at all on the globular clusters. One that I had never done for some reason was M15, one of two of the most concentrated globulars in the entire sky. (47 Tuc is the other in the southern hemisphere)

Look closely at the star colors that compose this object. A generally blue population of faint stars around 15th magnitude and fainter are interspersed with a handful of orange super giants. This represents two stages in the life of these ancient objects, which are nearly as old as the universe itself. It is currently assumed that most are the stripped out remnant cores of small galaxies that were in the process of merging 10 billion years ago to form our Milky Way Galaxy, and were left over when the process had completed it self.

Optics: 12.5" f/5 Newtonian - Lumicon Coma Corrector Platform: Astrophysics AP1200 Camera: Hutech Modified Canon XTi @ ISO800 Exposure: 12 x 5m = 1 hour Location: Payson, Arizona Elevation: 5150 ft. Sky: Seeing 6/10, Transparency 8/10 Outside Temperature: 55F Processing Tools: Photoshop CS2, Images Plus 3.82 HOME GALAXIES EMISSION NEBS REFLECTION NEBS COMETS GLOBULARS OPEN CLUST PLANETARIES LINKS