Willem J. Luyten
(1899-1994), Ejnar Hertzsprung's first graduate student at Leiden, overcame
many obstacles to achieve outstanding success in his search for white dwarf
stars. When he was first employed at Harvard Observatory in 1923, only three
white dwarfs had been recognized. Among the over half-million high proper
motion stars he discovered, he found about 7000 white dwarfs. From age 15, his
earliest observations were of variable stars, in which he maintained a lively
interest all his life.