Pluto
Photoelectric observations establish a roughly 6.4-day brightness periodicity for Pluto, providing the first reliable measurement of its rotation period.
Historical biography archive · Updated 2026-11-03
Merle Walker Biography and Timeline
Follow Merle Walker through 1 dated historical records for United States of America.
Merle Walker, historical timeline
A chronological timeline drawn from matching World History Database records.
1Distinct records
1 of 1Page
1955–1955Years on this page
1955
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.