Horsehead Nebula
The Horsehead Nebula, aka Barnard 33, is depicted here in a wavelength-ordered, narrowband (SII-SIIHa-Ha) palette.
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SPA-3
Found: 6 photo
Supernova Remnant CTB1 widefield
A faint bubble shape supernova remnant (a.k.a SNR G116.9+02) in Cassiopeia ~7500-10000 years old and ~9500 ly away. A mixed-morphology supernova remnant with its shell visible in both o...
