M 15 is a beautiful, round, regular globular cluster. It is strongly and uniformly getting brighter towards the tiny and really bright core. There is no resolution in the center. As one is going away from the core, it first starts to look granular then the brighter stars appear. Many stars are visible in the outer regions. About 15 of these can be drawn by position.
When I started astronomy and started to draw deep-sky around 1994, I didn't see this cluster resolved for a long time. Then around 1996 if I'm right I suddenly spotted that it consists of millions of stars. Since then I like the great globular of Pegasus very much. It was an important landmark on the way in which I learned to see when looking into the eyepiece.
Pavo galaxy
The grand spiral galasy of Pavo
Panorama drawing
Huge and faint supernova remnant in the southern sky
Centaurus globular cluster
The second globular in Centaurus
Apus globular cluster
Globular cluster close to the Southern celestial pole
Centaurus galaxy
Polar ring galaxy
Ara galaxy
Barred spiral galaxy in the thick of the Milky Way