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Signature of Johannes Kepler

Johannes Kepler

Kepler's own handwritten signature, a direct physical trace of the astronomer himself.

This is Kepler's own signature, a direct trace of his hand.

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Black ink handwritten signature on a white background. A large looping initial flourish leads into cursive script reading as the name Johannes Kepler, written in a sweeping, connected style.
Signature of Johannes Kepler.

About this source

What it is

This is the autograph signature of Johannes Kepler, the German astronomer, physicist, mathematician, astrologer and natural philosopher, written in his own hand in cursive script with a looping flourish.

Why it matters

A signature is a direct physical trace of a historical person. It helps confirm the authenticity of documents and letters attributed to Kepler and connects us physically to someone who shaped the scientific revolution.

Look closer

  • What does the style of the handwriting suggest about the period it was written in?
  • Why might historians use a signature to verify other documents?
  • What can and can't a signature tell us about a person?

This document is part of the curated material that grounds the AI version of Johannes Kepler on Humy.ai — when students ask about related events, the AI can quote it and cite it.

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Title page of Astronomia Nova, printed in Latin with mixed roman and italic capitals and a Greek subtitle. It reads Astronomia Nova, Aitiologetos, seu Physica Coelestis, on the motions of the star of Mars, from the observations of Tycho Brahe, by Johannes Kepler, Prague, 1609. A small library stamp appears at the lower left.Book

Secondary source

Astronomia Nova

Johannes Kepler · 1609

Title page of Johannes Kepler's Harmonices Mundi, 1619, printed in Linz, Austria. It lists the five books in Latin, shows a small woodcut vignette of a winged figure, and bears handwritten notes in pencil at lower left.Book

Primary source

Harmonices Mundi

Johannes Kepler · 1619

Title page of Kepler's Mysterium Cosmographicum in Latin, printed in Frankfurt by Erasmus Kempfer for Godefridus Tampachius, dated 1621 (MDCXXI) on this edition. Aged, brownish paper with a red library stamp at right.Book

Secondary source

Mysterium Cosmographicum

Johannes Kepler · 1596 (2nd edition 1621)

Book

Secondary source

The Martyrs of Science: Galileo, Tycho Brahe and Kepler

David Brewster

Two-page scan of an early 17th-century book: on the left, an engraved frontispiece of a domed rotunda with columns, astronomical instruments and figures, and a tablet reading Tabulae Rudolphinae; on the right, a title page in Latin with large capitals announcing Tabulae Rudolphinae by Johannes Kepler, dated 1627, with a red library stamp at top right.Book

Secondary source

Rudolphine Tables

Johannes Kepler · 1627

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