Really nice design overall some thoughts:
The world building logo works really badly in extremely small size. The browser icon is see is unreadable. The graphic could do with some changes for better visual readability.
- The ring should be bigger (in relation to sphere)
The ratio of planet and ring should be bigger. In other words the planet should be smaller than the ring.
This would help visually understand what is going on and the result is more easily recognizable by glance as the silhouette is more prominent
alternatively drop the ring all together.
- The tessellation on the sphere is hard to see in smallest sizes
Drop the tessellation level down when the size gets smaller. Possibly the logo could tessellate even more in posters but that is not necessary.
[![enter image description here][1]][1] **Image 1**: Quick example of what I mean. Oh and while drawing this it seems that the tessellation is a bit erratic (its not a divided Truncated icosahedron as it initially seems)This would give the logos structure more adaptability that would make the smaller sizes work better.
This becomes more critical if the the ring is dropped or stays the same size.
By decreasing tessellation you can keep lines thicker making them more defined.
For doing this well its better the sphere is actually a real geodesic than dropping detail would be more subtle and could be done on more levels. But yeah this might be overkill.
Other ideas for sake of brainstorming I dont think this matters much:
instead of ring make the lattice incomplete.
This makes again the silhouette more recognizable. Meye fracturing along equator would make the brain analogy better and so on...