The Blinking Planetary Nebula Click on image for larger version. NGC 6826 is a wonderful example of a planetary nebula due to the amount of detail it presents.
Human eyeballs have their least sensitive cells in the center of the fovea.
In a telescope this nebula glows a neon green with bright central star. This image also shows slightly reddish blobs in the 2 and 8 clock positions. The black and white image beneath the color version shows an ancient outer shell that was cast off by this star long ago. The most subtle application of unsharp mask was applied. Click here .