The walkway into the United States Space &amp; Rocket Center includes a display for each planet (and the sun), stretching approximately 590 ft (180m) from the Sun to Pluto, spaced appropriately.  Hemispheres on each display represent the planets, with the main display plate itself representative of the size of the sun.
<a href="//commons.wikimedia.org/wiki/User:Ke4roh" title="User:Ke4roh">James E. Scarborough</a>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>