An alternate planet walk.
The above is a fully to scale planet walk I'm working on high in the sky. The sun is shown on the far left and each line across the walkway represents the orbit of a planet. The inner planets look cozily spaced but with the sun at 0.1 meters in diameter, Neptune is some 300 meters distant. Its a long walk. The vertical white bars are an animated texture which represent the speed of light. Its slower than you might think - taking three minutes just to reach Mercury. I'm still tinkering with this exhibit and I've just had an idea for making it better. So I'll be taking it apart and rebuilding. Yay.