Dark Nebulae
Barnard 33 (Horsehead Nebula)
Dark Cloud in Orion in front of read emission nebula IC 434. Left to bright star Alnitak the so called Flame Nebula or NGC 2024.
This image shows originally very bright halos around bright stars caused by the IDAS NBX filter, which was very bad to this respect. Meanwhile IDAS has released NBZ as a better replacement … and it is really better.
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