David Gerdes, Professor of Physics and Astronomy at the University of Michigan, spoke on, “The Coolest Place in the Solar System.”

The region beyond Neptune contains thousands of small, icy worlds that bear witness to the processes that shaped our Solar System. While the first trans-Neptunian object, Pluto, was discovered nearly 80 years ago, only in the last few decades have we begun to explore this region systematically and understand its rich structure. Professor Gerdes described the discovery of a possible dwarf planet ("DeeDee") at more than three times Neptune's distance from the Sun.