Johannes Kepler was born on 27 December 1571 in Weil der Stadt, in the duchy of Württemberg (now in Germany).

Quick Scoop: Kepler’s Birth

  • Date of birth: 27 December 1571.
  • Place of birth: Weil der Stadt, then in Württemberg, in the region of Swabia (present‑day Germany).
  • Calendar note: Some German sources also mention this as 27 December 1571 in the Julian calendar, corresponding to the same nominal date but in the older system used then.

This small-town birth in late 1571 placed Kepler right in the heart of the Scientific Revolution, setting the stage for his later laws of planetary motion.

Why this date matters

  • Kepler’s 1571 birth means he grew up as ideas from Copernicus were spreading, which deeply shaped his support for the heliocentric model.
  • Living from 1571 to 1630, he became one of the central figures who turned early modern astronomy into a mathematically grounded science.

TL;DR: Johannes Kepler was born on 27 December 1571 in Weil der Stadt, Württemberg, in what is now Germany.

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