You didn't take this picture. It is a well known image of the horse head nebula taken by the hubble telescope. The original image is in black and white and the color was digitally added. Take a seat son, school's in session.
Well then let me point out that you're wrong again. The hubble telescope takes many images over days, weeks, and months(depending on the subject) to get a complete image like the one seen above. This shot took much more then two days to make, and none of the shots taken to create it used a 2 day exposure. Don't try to defend yourself with a stupid response that is also wrong, just admit defeat and get yourself educated. Start here about a similar picture of this nebula taken from Earth: http://www.noao.edu/image_gallery/html/im0057.html
Then read this to understand how the colors are formed: http://hubblesite.org/gallery/behind_the_pictures/meaning_of_color/
Then read this to understand how the colors are formed: http://hubblesite.org/gallery/behind_the_pictures/meaning_of_color/