Marine Clock Experiments Advance
Harrison's early precision clock experiments addressed the longitude problem that gave Greenwich astronomy much of its practical importance.
Historical biography archive · Updated 2026-11-03
John Harrison Biography and Timeline
Follow John Harrison through 6 dated historical records for Great Britain.
John Harrison, historical timeline
A chronological timeline drawn from matching World History Database records.
6Distinct records
1 of 1Page
1730–2007Years on this page
1730
1735
Longitude Work
Harrison's marine timekeeping work enters longitude debates centred on Greenwich.
Role range: 1735-1773
Invention of Chronometer
Invents the chronometer
1773
Marine Chronometer Accuracy Assessed
The longitude debate brought precision marine timekeepers into comparison with astronomical methods and naval needs. The measurements helped reduce uncertainties in celestial reference positions.
1969
Hawkwind
Slattery and Brock jammed together and with whoever else was around, the genesis of Hawkwind is in their meeting with bass player John Harrison, who was also taking an interest in experimental music. Founder Member of Hawkwind
2007
Peter Harrison Planetarium Opens
The new Peter Harrison Planetarium opened at Greenwich, presenting modern astronomy to visitors at a historic centre of celestial navigation.
Records, sources and methodology
These dates and descriptions come from the historical_events database. Exact duplicate records have been collapsed. Names are grouped by the country, Name 2 and Name 1 fields; records with missing Name 2 cannot be reliably assigned to an individual biography. Check the underlying sources before formal citation.