Emerging like a celestial dolphin leaping through the cosmos, Sh2-308, or the Dolphin Nebula, is a striking example of a Wolf-Rayet bubble located in the Canis Major constellation. This...
This is an emission nebula in Cygnus. There are some differences in the naming of the object. It was originally recorded as Simeis 57 in the 1950's. But later in a 1969 paper, it was as...