M55, aka NGC 6809 close-up (LRGB)

M55 is estimated to be about 12.5 billion years old, and thus contains very old stars, mostly of spectral types F to K and evolved red giants. Despite being in Sagittarius, where dust is abundant, M55 is located in a relatively dust-free region, so extinction in its direction is less than typical for that constellation. Approx. 4 and half hours of LRGB data from the remote Telescope Live observatory in Chile. Pre and Post processing in Pixinsight with final touch-ups in Paintshop Pro ultimate.