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NGC 2438 Planetary Nebula
Imaged by Martin S. Ferlito copyright
Film Photography
Nikon FE2 Kodak E200 ASA film, 45 minute guided exposure
Schmidt-Cassegrain on Vixen GP Mount, Stepper Driven.

Discovered by William Herschel in 1786.
Planetary nebula NGC 2438 appears superimposed over the open star cluster M46, although it is almost certainly no member of the cluster, but a foreground object (see M46 for details). It is one of the discoveries of William Herschel, who cataloged it as H IV.39
Planetary nebulae have been detected in several globular star clusters in our Galaxy. These densely-packed, gravitationally-bound groups of 100,000s to millions of stars are far older than their open cluster counterparts.


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