M33 – Annotated
I have used the excellent Plate Solve and Annotate scripts within Pixinsight as well as the new function, adaptive stretch, which really seems to make the initial transform from linear to non-linear data a skoosh!
Anyway, the plate solve has showed up a lot of little galaxies that I never knew were there! The PGC markers are these tiny distant galaxies, some of which have no distance data, the couple I did find were in the region of 500,000 light years! You need to click the image to see it full size in order to see these little background galaxies