==Discoveries==He discovered the periodic comet 53P/Van Biesbroeck, as well as two non-periodic comets: C/1925 W1 (Van Biesbroeck 1) and C/1935 Q1 (Van Biesbroeck 2).
== Delo ==Največ se je ukvarjal z dvojnimi zvezdami, kometi, asteroidi in spremenljivkami.