There are some scale models of the solar system in various museums and universities. I saw the one at UC Boulder a decade ago and remember being blown away by

There are some scale models of the solar system in various museums and universities. I saw the one at UC Boulder a decade ago and remember being blown away by the ratio of how small the planets are to their solar distances. To make the model fit within the campus, the planets, especially the non-gas-giants, are surprisingly small. And much further away from the Sun than you'd naively think from the usual solar system drawings in the science books.