The very brightest part of
this nebula (the knot at the western edge) is separately classified as NGC 896, because it was the first part of this nebula to be
The nebula's intense red output and its configuration are driven by the radiation emanating from a small
group of stars near the nebula's center. This open cluster of stars known as Melotte 15 contains a few bright stars nearly 50 times the mass
of our Sun, and many more dim stars that are only a fraction of our Sun's mass.