Ptolemy

2nd-century Roman mathematician, astronomer, geographer

  • Fame76.1
  • Momentum0.0
  • Academics rank#76
Source-basedFalling
  • Fame76.1
  • Momentum0.0
  • Academics rank#76
  • Wikipedia61.2K
Lived 100–170, aged 70
AcademicsAcademic
  • Wikipedia
    121 languages
    Cross-language footprint
  • Era
    100–170
    Aged 70
Summary
Updated 2026-06-08

His model placed Earth at the center of the cosmos — and for 1,400 years, it worked well enough that no one in three civilizations could improve on it.

Biography

About

Claudius Ptolemy was a Greco-Roman mathematician working in the second century AD who wrote roughly a dozen scientific treatises. Three survived to reshape medieval knowledge: the Almagest, his astronomical work that presented the only mathematically rigorous geocentric model of the solar system; the Geography, a systematic treatment of maps and the known world; and the Tetrabiblos, where he tried to reconcile horoscopic astrology with Aristotelian physics. The Catholic Church later promoted his astronomy, and Byzantine and Islamic scholars copied his works through late antiquity and the Middl…

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By the numbers

Score breakdown

The six component signals behind the Fame score, and their ranks across the leaderboards.

Fame
Falling
76.1
Composite of search demand, mentions, audience & graph footprint.
Score components
Historical26.2
Now attention7.4
Source confidence60.0
Completeness60.0
Global rank
Country rank
Category rank
#76
Receipts

Sources

  • Wikipedia
    wikipedia · en.wikipedia.org
    High confidence
  • Wikidata
    wikidata · wikidata.org
    High confidence
  • Pantheon 2.0
    database · pantheon.world
    High confidence