DescriptionNGC 281- The Pacman Nebula in narrowband (SII-Ha-OIII).tif
English: NGC 281 imaged by David McFeely.
The image is an amalgamation of three monochrome images. Each monochrome image was taken at a different wavelength in the electromagnetic spectrum. Specifically, Sulphur II, Hydrogen Alpha, and Oxygen III. Each mono image has been assigned to one of the colour channels (red, green, blue).
The combination of the wavelengths is referred to as a palette. The combination shown here is Nasa's Hubble Palette.
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