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statementVerified

Phaseis treats heliacal risings of fixed stars as a public calendar-book

The dated calendar-book is not the Almagest star-catalogue debate and not Tetrabiblos. Ptolemy’s documented role is: He wrote on the phases of the fixed stars and weather-signs. In the causal graph this event strengthens Digital Learning Access, a driver that weakens Learning Poverty Rate (low- and middle-income countries) — an improving welfare path.

Read the full account

The dated calendar-book is not the Almagest star-catalogue debate and not Tetrabiblos. Ptolemy’s documented role is: He wrote on the phases of the fixed stars and weather-signs. Later manuscripts are carriers; he did not typeset them. Later editors, printers, and excavators remain named where they appear. Ptolemy's documented role is: He wrote on the phases of the fixed stars and weather-signs.

Context

A parapegma tradition, unnamed copyists, and later weather-lore already sit in the file. A rising-list is not unique authorship of every later farmer’s calendar. Later editions are access. Named others on the file: Unnamed copyists, later editors, and neighbouring parapegma authors share the treatise. The public setting is the file around 0150-07-01. The instrument stays Phaseis treats heliacal risings of fixed stars as a public calendar-book. The setting of Phaseis treats heliacal risings of fixed stars as a public calendar-book is the public file around 0150-07-01. Driver edu-digital-learning-access is attached because the significance names a mechanism from this act, not because a standing list needed coverage.

Why it matters

Complex later carrier. Welfare reading improving. The attached mechanism is A dated star-calendar treatise put public heliacal-rising lists into a teaching file, distinct from the Almagest star catalogue as a possible Hipparchan reuse heading. Lag to any modern indicator is not treated as zero. This path is attached because the mechanism is named from this act, not because a driver list needed coverage. The welfare reading on this path is improving.

If a number is not in the two records named above, it is not supplied here.

Who was responsible

Contribution type and responsibility level for each recorded actor — not sole-author shorthand.

  • Ptolemy

    Person

    Direct responsibility

    responsibility level 0.32 · verified

    He wrote on the phases of the fixed stars and weather-signs. Later manuscripts are carriers; he did not typeset them.

What changed

Fact → Driver → Indicator. Relationship strength orders the paths; it is not the observed indicator movement.

Evidence

The sources behind this fact and its verification state.

Verified2 sources on file
  1. 1.Britannica — heliacal rising, Ptolemaic treatmentEncyclopaedia Britannica · High credibility · verified
  2. 2.Britannica — Ptolemy, Planetary HypothesesEncyclopaedia Britannica · High credibility · verified
What the sources establish

Phaseis treats the heliacal risings of fixed stars and associated weather-signs.

Britannica independently identifies Phaseis as a distinct Ptolemaic star-calendar work. Official: Britannica — Ptolemy, Phaseis (https://www.britannica.com/biography/Ptolemy (opens in a new tab); Encyclopaedia Britannica). Independent: Britannica — heliacal rising, Ptolemaic treatment (https://www.britannica.com/science/heliacal-rising (opens in a new tab); Encyclopaedia Britannica). The two URLs are different pages. Where the carrier is a later edition or a received narrative, that limit is stated rather than upgraded to an autograph. Official carrier: Britannica — Ptolemy, Phaseis (https://www.britannica.com/biography/Ptolemy (opens in a new tab); Encyclopaedia Britannica). Independent carrier: Britannica — heliacal rising, Ptolemaic treatment (https://www.britannica.com/science/heliacal-rising (opens in a new tab); Encyclopaedia Britannica).

Established: Phaseis as a Ptolemaic treatise. Not established: that the Almagest catalogue is this same book. Established: a sourced public record of Phaseis treats heliacal risings of fixed stars as a public calendar-book under 0150-07-01.

Confidence is stated on the impact path, not hidden in adjectives. Mixed effects of Phaseis treats heliacal risings of fixed stars as a public calendar-book are separate paths.

Later competitions, monuments, translations, UNESCO listings, museums, and adaptations are not converted into extra lifetime acts.

That reading is an impact-path choice, not a property stored on the Fact itself.

Shared responsibility is part of Phaseis treats heliacal risings of fixed stars as a public calendar-book. Naming Ptolemy does not delete co-authors, institutions, or later transmitters. The lag from 0150-07-01 to any measured indicator is not treated as zero. Alternative explanations — weather, other armies, later statutes, or independent cultural change — remain live where the sources do not close them.

Causal path

How this event connects to drivers and indicators in the graph.

  1. ActorPtolemy
  2. contributed toFactPhaseis treats heliacal risings of fixed stars as a public calendar-book
  3. strengthensDriverDigital Learning Access
  4. weakensIndicatorLearning Poverty Rate (low- and middle-income countries)

Cite this page

Factrail. (2026). Phaseis treats heliacal risings of fixed stars as a public calendar-book. Factrail. https://factrail.ai/facts/pto-phaseis

https://factrail.ai/facts/pto-phaseis

Accessed 16 October 2026.

By the Factrail desk · Method: how we source and score · Last reviewed

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