The caption reads:

URANUS:

Appears Green in a Telescope. A Giant Ball of Frozen Noxious Gases With Strange Magnetic Fields. And Its Axis So Tilted That Each Pole In Turn Points To The Sun! Perhaps a Solid Centre But No Solid Surface. No Place To Visit. No Other Home For Mankind Here. Earth Is Our Only Hope.

From the distance markings it can be seen that this model is on the route to Taunton: there are two complete models, the other towards Bridgewater, both starting from The Sun model at Upper Maunsel Lock.