Willem de Sitter

Willem de Sitter, Dutch mathematician, physicist, and astronomer (died 1934)

Find birthday twins Open interactive profile

Born: May 6, 1872
Died: November 20, 1934
Zodiac sign: Taurus
Birth year: 1872

About Willem de Sitter

Willem de Sitter was a Dutch mathematician, physicist, and astronomer. He is known for the de Sitter universe, which is a cosmological model that was named after him. De Sitter was also well-known for his research on the motions of the moons of Jupiter, and was invited to give the George Darwin Lecture at the Royal Astronomical Society in 1931.

Biography source: Wikipedia. The profile adds birthday-specific historical context from the Celebs Birthday Today editorial database.

The world when Willem de Sitter was born

Willem de Sitter was born in 1872. The year snapshot below places that birthday in its cultural and historical setting: the music and films people were following, the headlines shaping public life, and the everyday prices families encountered.

Culture in 1872

Best-selling bookAround the World in Eighty Days by Jules Verne

Headlines and milestones

Top headlineYellowstone established as first national park
Technology milestoneCelluloid (first plastic) manufacturing begins
World population~1.52B

United States snapshot

U.S. leaderUlysses S. Grant
U.S. population40.2M

1872 versus 2026

These figures put everyday life in Willem de Sitter's birth year beside the site's latest United States snapshot.

Measure	1872	2026
Population	40.2M	341 million

Sources and editorial standards

This profile combines a biographical source with structured birthday and historical context. Sources recorded for this profile: Wikipedia, Encyclopaedia Britannica, Library of Congress, Wikidata. See our editorial policy for sourcing, corrections, and review standards.

Read the source biography on Wikipedia. Wikipedia text is available under the Creative Commons Attribution-ShareAlike License.