(1629–95) Dutch astronomer and physicist,
who worked at the Academy of Science in Paris from 1666 to 1681. Returning to The Hague, his birthplace, in 1657, he designed the first pendulum clock and made improvements to astronomical telescopes (with which he discovered Saturn's satellite Titan in 1655). His greatest achievement was the wave theory of light, announced in 1690 (see Huygens' construction).
Subjects: Science and Mathematics.