M16 (Messier object 16 also know as the Eagle Nebula) is an open star cluster surrounded by Nebula in the constellation Serpens Cauda (The snakes tail). The cluster is ~5700 light years away and was given fame from the Hubble image know as the Pillars of Creation.
Below are some images of the Cluster and Nebula I took last week. The first was made from separate Luminance, Red, Green, Blue and Ha Filters (The Ha is a narrow band filter Hydrogen Alpha filter at ~656 nanometers). The Ha data was added to the red data since this is very red. The first image is ~ what the nebula would look like to our eyes if they where sensitive enough to see the image in color. The second image was made with separate narrow band filters, OIII (501 Nanometer) used to show ionized oxygen emmission lines , Ha is used to show the Hydrogen Alpha emmission lines and SII (672 Nanometer) is used to show ionized sulfur emission lines, ) and where combined in what is called the Hubble Palette. If you download the images you can easily make out the "Pillars of Creation" in both views).

For the Hubble Palette the OIII data is used for the blue channel, the Ha is used for the green channel and the SII is used for the red channel. This products a false color image but makes it easier to see the composition of a nebula. Note: The Ha (green channel) is there throughout the nebula and when combined with the SII (red channel) produces the golden color and the OIII combined with the Ha produces the light blue aqua color. Note: Note the green channel is the strongest and had to be reduced to allow the other colors to show though. All question comments and suggestions are welcome.