The Iris Nebula

Sep 06, 2010

Last night I took this picture of the Iris Nebula (NGC 7023) with my 10 inch reflector telescope and my CCD camera. The blue light is starlight from the bright central star that has reflected off from the interstellar dust. The dust reflects blue light more than other colors. The reason is the same as why our daytime sky is blue. Anyway, such nebulae are called reflection nebulae.