Ptolemaic system
AssessTechniques
The classical Earth-centered model of the heavens used in pre-modern astronomy.
Why it's here
Placed in Assess: 1 article(s) of evidence from 1 source(s), led by research-stage coverage, with 1 in the last 30 days. Confidence 24%. Low accumulated evidence, so it defaults conservatively pending more signal.
Evidence (1)
- 4Hacker News·7/28/2026researchArs Astronomica publishes English translations of rare astronomy texts
Ars Astronomica is a scholarly imprint focused on first English translations of historical Hebrew and Latin works on astronomy, cosmology, and natural philosophy. The catalog includes rare and manuscript-only texts from authors such as Gersonides, David Gans, Riccioli, Gassendi, and Avraham bar Ḥiyya, making related sources readable side by side in one language for the first time.