This is an image of NGC 6559. This is a beautiful nebula complex of emission (red), reflection (blue) and dark (black) nebula about 5,000 light years away in the constellation Sagittarius. The nearby stars ionize the hydrogen gas to form the emission nebula and small dust particles reflect the star light to form the reflection nebula. Thick dust particles block out light to form the black dark nebula.
Comments and suggestions appreciated.