Armand H. Delsemme is an internationally recognized comet scientist who until 1988 was a professor of astrophysics at the University of Toledo, Ohio. He has made fundamental contributions to our understanding of the origins and chemistry of comets, and has received many honors for his work, including the Kuiper Prize from the Division of Planetary Sciences of the American Astronomical Society in 1999. A Sigma Xi member and an avid skier, he celebrated his 80th birthday in 1998 atop Vail Mountain in Colorado at an elevation of 11,400 feet (which brought him just a little closer to the comets). Address for Delsemme: 2509 Meadowwood Drive, Toledo, Ohio 43606.