Kron, along with two colleagues, conceived the Sloan Digital Sky Survey, a collaboration of 13 institutions and 200 astronomers around the world that in 1998 began conducting the largest census every taken of the sky. Previously, Kron, who studies galaxies and quasars, helped to build the Sloan Survey's data processing system and had served as the survey's scientific spokesman before becoming its director. He also is a former director of the Yerkes Observatory in Williams Bay, Wisc. The son of astronomers, Kron was born in Australia while his parents worked at Mount Stromlo Observatory. He spent his first 14 years at Lick Observatory in California, where his parents were University of California astronomers.