Historedia
Person

Heinrich Louis d'Arrest

Events
1
Episodes
2
Years
1846

Every event in Historedia whose sources name Heinrich Louis d'Arrest, with the role they cite and all of that event’s episodes. This is not a biography, and mentions are grouped by name, so two people with the same name can share this page.

Events and episodes

  1. Neptune discovered at Berlin Observatory; Lassell finds Triton

    1846

    Role: Student assistant to Galle

    1. 23-24 September 1846 · Berlin ObservatoryDiscovery of Neptune at Berlin

      Galle and d'Arrest observed Neptune on 23 September 1846, confirming Le Verrier's predictions within 1° of the calculated location.

    2. 10 October 1846 · LiverpoolDiscovery of Triton from Liverpool

      William Lassell discovered Triton, Neptune's largest moon, on 10 October 1846, seventeen days after the planet's discovery.

Sources

  1. Johann Gottfried Galle Wikipedia, revision of 2026-08-29
  2. Discovery of Neptune Wikipedia, revision of 2026-10-04