Historedia
Person

Giuseppe Piazzi

Events
2
Episodes
4
Years
1801–1838

Every event in Historedia whose sources name Giuseppe Piazzi, 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. Giuseppe Piazzi discovers Ceres, the first asteroid

    1801

    Role: Astronomer and discoverer

    1. 1 January 1801 · Palermo Astronomical ObservatoryDiscovery of Ceres

      Piazzi discovered a moving stellar object at Palermo on 1 January 1801, identifying it as the predicted missing planet.

    2. 24 January to 11 February 1801 · Palermo, SicilyObservation and Announcement

      Piazzi observed Ceres twenty-four times until illness interrupted his work on 11 February 1801, having announced the discovery on 24 January 1801.

  2. Friedrich Bessel measures the distance to a star (61 Cygni)

    1837–1838

    Role: Astronomer

    1. 1837–1838 · Königsberg ObservatoryBessel Measures 61 Cygni Parallax

      Friedrich Bessel conducted an observational campaign in 1837–1838 at Königsberg Observatory, measuring the parallax of 61 Cygni using a Fraunhofer heliometer.

    2. 1838 · Königsberg ObservatoryPublication of Parallax Results

      Bessel published his findings in 1838, establishing the first reliable distance scale to stars through trigonometric parallax measurements.

Sources

  1. Giuseppe Piazzi Wikipedia, revision of 2026-09-04
  2. Ceres (dwarf planet) Wikipedia, revision of 2026-09-29
  3. 61 Cygni Wikipedia, revision of 2026-09-30