The model of the Sun is a 2.5 metres (8.2 ft)-wide 14-ton concrete sphere, with a vertical segment removed to give two vertical faces upon which explanatory plates are mounted. The solid sphere was cast by Pip Youngman and Trevor Hill in the grounds of what was the SWEB storage yard adjacent to the Obridge Viaduct in Taunton. Originally 'natural' in colour (matching the other models) it was painted yellow as part of the refurbishment, making it much more visible.