Cosmology
De Sitter develops an expanding relativistic cosmological solution without matter, influencing later debate over cosmic expansion
Historical biography archive · Updated 2026-11-03
Willem de Sitter Biography and Timeline
Follow Willem de Sitter through 3 dated historical records for Netherlands.
Willem de Sitter, historical timeline
A chronological timeline drawn from matching World History Database records.
3Distinct records
1 of 1Page
1917–1917Years on this page
1917
Cosmology
De Sitter finds a relativistic cosmological solution that later becomes important in expanding universe models
De Sitter Cosmological Model
De Sitter develops a solution of Einstein's equations containing a cosmological constant, demonstrating that cosmic behaviour can be strongly affected by vacuum-like geometry.
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.