Skip to content

Following Kepler

Tracing the history of medieval astronomy

Tag: astronomy

Posted on November 15, 2025

Ingazio Danti and the Gregorian Calendar Reform

Sorry for the slow posting. I was gone for half of October and the first week of November. Why?

I was on a European adventure to Italy and Greece. Part honeymoon, part collecting material for some new videos. Here’s the first of them!

Completion

Almagest
85%

De Revolutionibus
0%
Astronomia Nova
0%

 

Important Posts

  • Almagest: Index
  • History of Ptolemy’s Star Catalog: Index
  • Star Catalog Manuscripts Index
  • My Library
  • Class Schedule
  • Class Materials
  • Spinoff Project Ideas

Other Pre-Telescopic Astronomy Websites

  • The Astrolabe Project
  • The Renaissance Mathematicus

Archives

Categories

  • Almagest
  • Astronomia Nova
  • Astronomical History
  • Astronomicum Caesareum Facsimile Restoration
  • Astronomy Before the Telescope
  • Classes
  • Comets
  • Data
  • Instrumentation
  • Meta
  • Models
Privacy Policy Proudly powered by WordPress