The visitor's experience would be that of an explorer in Space. There are three major zones in the exhibit as marked out. The path at the exhibit is outlined by intersecting metallic orbits in the concrete floor. In the plan, the dotted lines show the story lines a visitor can follow.
A storyboard of the visitor's Space exploration:
Each zone has specific interactions assigned to it. Some of the detail is captured below. The Space habitat at the centre of the exhibit is double shelled. The inner shell is a pressurised piece of bubbletecture held aloft by tubes of air that rise up in a helical manner. The fabric is made of two layers of lightweight plastic. The pockets formed are filled with silica aerogel as it protects from UV rays and insulates.
The exterior shell is hard and formed of modules. These would have to be heavy to stay on the surface in low gravity situations. For the exhibit, the shell has to be split in half to accommodate meetings and social events. A pulley system on either side of the space help carry the load of the half hemispherical shell. Individual modules are made of papercrete or mycelium bricks(so they can be lifted easily). The modules can be fixed together with adhersives or cement depending on what they're made of.
The habitat is an explorer's refuge in the hostile environment that is Space. Taking inspiration from a mirage in a desert, the modules are motifs of the palm leaf. The habitat could also need to shift depending on an explorer's interest, as a dune shifts to the wind. Hence, the modularity.
A speculation on how the dome could be formed on its own is below. Each module of a horizontal layer is inclined towards the inner shell. The curvature is made by a 15 degree incline at the second layer and a degree's decrease at every additional layer.
The interior of the habitat is biophilic, to keep earth-like features in sight. The central column that makes a skylight at the apex of the dome is also in the shape of a tree reaching to the light.
The graphic language of the exhibit follows ESA's existing branding and print collateral i.e. intersecting orbits, default typeface, flags and photography from ESA's media library. An indication of the same is below.
P.S. I got obsessed with domes during this project. There were plenty more sketches that were better ideas but I lost them due to my own carelessness and not documenting on time.