CRTAstro
Well-Known Member
NGC 6559 is a star-forming region just east of the Lagoon in the Sagittarius constellation located about 5,000 light-years away. It contains clouds of gas and dust and shows both emission (red) and reflection (blue) regions.
More detail here: https://www.astrobin.com/gbpmzz/
More detail here: https://www.astrobin.com/gbpmzz/