M31's Core.

[median dust]

Details:

600 x 2 minute exposures (20 hours total)
Bortle 4

Equipment:

Skywatcher quattro 250p
ZWO ASI533mc pro with Uv/ir cut filter
Sky watcher eq6r pro
Sky watcher quattro coma corrector
Zwo EAF
Zwo AsiAir
William optics uniguide 50mm
Zwo Asi120mm mini

Software:

Pixinsight
Photoshop

Map of the globular clusters I was able to resolve.

[marsh pecan]

Most images I see of M31's core lack the sharpness that your image has.