BornDiest, Belgium, 21 January 1848
DiedParis, France, 21 June 1908
Luiz Cruls was director of the Rio de Janeiro Observatory (Brazil). His annus mirabilis was 1882; in that year he observed the transit of Venus and discovered the Great Comet C/1882 R1 (on 10 September). A crater on Mars is named for Cruls.