about
nebula
horsehead
ngc6992 Veil nebula   ngc2264 Cone nebula   b33 Horsehead nebula
NGC6992
  
NGC2264
  
B33
       
M8   NGC2070   NGC2237 Rosette Nebula
M8
  
NGC2070
  
NGC2237
         
Helix Nebula   ngc6726   M20
NGC7293
  
NGC6726
  
M20
         
M1   ngc2359   IC447
M1
  
NGC2359
  
IC447