Sarah Lippincott Zimmerman ’42, M’50Sarah, who broke ground in the use of astrometry to discover the character of binary stars and search for extrasolar planets, died Feb. 28, 2019. Sarah was a protégé and colleague of internationally recognized astronomer Peter van de Kamp for nearly 30 years before succeeding him as longtime director of Swarthmore’s Sproul Observatory. A professor of astronomy, Sarah published more than 100 academic papers and co-authored two books, Point to the Stars and Philadelphia: The Unexpected City. Among her numerous honors were the Kappa Kappa Gamma Alumnae Achievement Award in 1966, an honorary doctor of science from Villanova University in 1973, and election to the Distinguished Daughters of Pennsylvania in 1976. Read more.