TV Program Description
At Harvard's stadium, astronomers and science historians play around with an eight-foot-diameter model of the sun. By comparison, Pluto is the size of a ball bearing from a roller skate. ©WGBH Educational Foundation
At Harvard's stadium, astronomers and science historians play around with an eight-foot-diameter model of the sun. By comparison, Pluto is the size of a ball bearing from a roller skate. ©WGBH Educational Foundation