Christiaan Huygens
Dutch mathematician, physicist and astronomer
- Lived
- 1629–1695
Updated September 2026
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All free classicsAbout Christiaan Huygens
Christiaan Huygens, Lord of Zeelhem was a Dutch mathematician, physicist, engineer, astronomer, and inventor who is regarded as a key figure in the Scientific Revolution. In physics, Huygens made seminal contributions to optics and mechanics, while as an astronomer he studied the rings of Saturn and discovered its largest moon, Titan. As an engineer and inventor, he improved the design of telescopes and invented the pendulum clock, the most accurate timekeeper for almost 300 years. A talented mathematician and physicist, Huygens authored the first modern treatise where a physical problem was idealized using mathematical parameters, while his work on light contains the first mathematical and mechanistic explanation of an unobservable physical phenomenon.
Biography from Wikipedia, CC BY-SA 4.0. Photo via Wikimedia Commons.
Sources: book lists and dates from Wikidata and Open Library, ratings from Open Library readers, free texts from Project Gutenberg. Last updated September 2026.

