NGC 6559 is a rich colorful tapestry of
diverse nebulosity. The glowing red cloud known as NGC 6559 has
formed from the same molecular cloud that gave rise to its neighbor
the Lagoon Nebula (M8). The region is awash in young stars, many
of which are obscured by the ubiquitous dust in the region. Within
the nebula complex are several bright blue reflection clouds glowing
by way of starlight reflected from innumerable microscopic dust
particles enveloping the brighter stars. The two brightest reflection
clouds are catalogued as NGC 6559 (south) and IC 1274 (north).
The meandering channel of dark dust appearing etched into the
background of bright emission is known as B 303. The small conspicuous
patch of bright emission towards the southern edge of the complex
is known as GN 18.06.6.01 and is likely a small superimposed HII
region.