NGC 6559 Few regions of nebulosity show the variety of color and detail that this small region around NGC 6559 does. At the top of this image wispy dark clouds hang delicately in the foreground of diffuse glowing hydrogen gas. These lead further down towards a very bright,red arc of gas that seems to sheild luminous and hot stars beneath it. Presumably the birth and subsequent energetic radiative output of these stars causes the gas to glow very brightly. Even though these stars have strived to push away all of the gas and dust near them; thicker portions remain (the mountains of dark nebulosity) and continue to scatter light which color the area with hints of blue and purple. NGC 6559 can be found in most wide field images of the Lagoon Nebula. John and Christie Connor/Adam Block/NOAO/AURA/NSF Visit Caelumobservatory.com for more images and information!