This is an interesting
demonstration on how the Luminance channel can control the colors.
Both images use the same file for the color data.
This false color image
was acquired with Ha, SII and OIII filters mapped to the RGB
channels respectively. So in these images Red indicates the presence
Sulfur, Green Hydrogen and Blue for Oxygen
North is to the
The Lagoon Nebula (also known as M8 and NGC 6523) is a giant
interstellar cloud and HII region, in the constellation Sagittarius.
At an estimated distance of 5,200 light-years, the Lagoon is one of
only two star-forming nebulae faintly visible to the naked eye from
mid-northern latitudes. In binoculars, the Lagoon is a distinct oval
cloudlike patch with a definite core, like a pale celestial flower.
The nebula has a delicate star cluster superimposed on it, making
this one of the leading celestial sights of summer night skies.