by Dennis Roscoe, Ph.D
Roscoe Skies click here
How is it done?: These images were formed by a technique call Narrow Band Imaging with the use of the Hubble color palette.
Typically, eight 30min exposures are taken for each of three different filters. The filters pass ionized sulfur, hydrogen, and oxygen wavelengths to form the red, green and blue components of the color image.
In total, it takes about 12 hours of imaging time to form each image. The images were taken through a 130mm refractor telescope with an 8 mega pixel astronomical camera. There is some addition post-processing with PhotoShop.
(images used with permission, copyright Dennis Roscoe, Ph.D)