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Cocoon Nebula (IC5146) and B168
Canon EOS 5D MkII ISO6400 33x30s
254mm Newtonian f/4.8 (f=1200mm)
HEQ5 mount, driven but not guided
Taken from Rookhope, Co.Durham, UK
2011 Sep 28 22:50:49-23:10:12 UT
Processed by my own GRIP software (Java)
This nebula, embedded in the Milky Way at the north end of Cygnus, appears to have cleared a path through the stars. That is not possible. A more reasonable explanation is that, at about 4,000 light years away, it is closer to us than most of the stars in the photo and it has an associated dust cloud that is obscuring stars behind. The dust cloud is one of many "dark nebulae" catalogued by Barnard and this is B168.
Cocoon Nebula (IC5146) and B168
Canon EOS 5D MkII ISO6400 33x30s
254mm Newtonian f/4.8 (f=1200mm)
HEQ5 mount, driven but not guided
Taken from Rookhope, Co.Durham, UK
2011 Sep 28 22:50:49-23:10:12 UT
Processed by my own GRIP software (Java)
This nebula, embedded in the Milky Way at the north end of Cygnus, appears to have cleared a path through the stars. That is not possible. A more reasonable explanation is that, at about 4,000 light years away, it is closer to us than most of the stars in the photo and it has an associated dust cloud that is obscuring stars behind. The dust cloud is one of many "dark nebulae" catalogued by Barnard and this is B168.