The cornerstone of the Visiting Our Solar System interactive exhibit in Discovery Park is the design of the sun, which is 45 feet in diameter. Surrounding the VOSS sun (pictured here) are the planets Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune set into a series of curved, 6-foot-high walls. Jeff Laramore and Tom Fansler of Smock Fansler Corp. of Indianapolis were the designers of the $1.5 million project. (Purdue University photo/Mark Simons)