The Butterfly Nebula gets its name from its two-winged appearance. The bright star at the top of the image is Sadr, in the constellation Cygnus (the swan). Hydrogen (green), oxygen (blue) and sulphur (red) depict a colourful and chaotic area of extended nebulosity.
Credit: Johannes Schedler.
Download High Res Tif and Caption (31.2 MB)