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NGC7538 (sh2-158)
Penryn, California
July 2005/2006
FS-128 (ag, ST-4)
  LRGB 15 minutes each  (2005 data)
ST-2000XM Lum 15 minutes each  (2006 data)

NGC 7538 is a very active complex star burst region.  Formaldehyde, methanol and water masers have been detected within the nebula.  The nebula contains a massive O type young stellar object (YSO) with a circum-stellar disk along with many other YSO's and proto stars.