castro.pic:
NGC2237 h-alpha
castro.pic:
NGC2237 h-alpha 1
castro.pic:
IC1340 h-alpha
castro.pic:
NGC7000 WideField h-alpha
castro.pic:
SH2-275 h-alpha
castro.pic:
Messier 42 h-alpha
castro.pic:
IC1848 h-alpha
castro.pic:
Messier 45 b/w
castro.pic:
IC443 h-alpha
castro.pic:
NGC 2264
castro.pic:
Sadr Region h-alpha
castro.pic:
IC 434
castro.pic:
IC444_Ha
castro.pic:
IC2177 h-alpha
castro.pic:
The Great Wall
castro.pic:
The Lagoon Nebula - M8
castro.pic:
Sh2-173 h-alpha
castro.pic:
NGC6992 h-alpha
castro.pic:
Golf of Mexico