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The Almagest records dated observations from 127 CE under Ptolemy’s name

Ptolemy’s documented role is: The Almagest lists observations from 127 to 141 at Alexandria. Dated observations in the Almagest are not a surviving autograph notebook. 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 observing-span is not the missing autograph logbook heading and not the Hipparchus-reuse debate as a theft heading. Ptolemy’s documented role is: The Almagest lists observations from 127 to 141 at Alexandria. Dated observations in the Almagest are not a surviving autograph notebook. Later editors, printers, and excavators remain named where they appear.

Context

An Alexandrian observer, unnamed instruments, and later auditors already sit in the file. A listed observation is not a unique recovered diary. Later Toomer is access. The public setting is the file around 0127-03-26. The instrument stays The Almagest records dated observations from 127 CE under Ptolemy’s name. The setting of The Almagest records dated observations from 127 CE under Ptolemy’s name is the public file around 0127-03-26. Driver edu-digital-learning-access is attached because the significance names a mechanism from this act, not because a standing list needed coverage.

Confidence is stated on the impact path, not hidden in adjectives. Mixed effects of The Almagest records dated observations from 127 CE under Ptolemy’s name are separate paths.

Why it matters

Medium confidence on unique autograph. Welfare reading improving. The attached mechanism is A dated observing-span put public numerical astronomy into a teaching file, distinct from the no-observing-log gap as a missing autograph book. 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.

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

Who was responsible

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

  • Ptolemy

    Person

    Direct responsibility

    responsibility level 0.36 · verified

    The Almagest lists observations from 127 to 141 at Alexandria.

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 — Almagest and related Ptolemaic worksEncyclopaedia Britannica · High credibility · verified
  2. 2.Britannica — Ptolemy, Planetary HypothesesEncyclopaedia Britannica · High credibility · verified
What the sources establish

The Almagest records observations dated from 127 CE under Ptolemy’s name at Alexandria.

Britannica independently dates Almagest observations from 127, distinct from a missing autograph log. Official: Britannica — Ptolemy, observations 127–141 CE (https://www.britannica.com/biography/Ptolemy (opens in a new tab); Encyclopaedia Britannica). Independent: Britannica — Almagest, dated observations (https://www.britannica.com/topic/Almagest (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, observations 127–141 CE (https://www.britannica.com/biography/Ptolemy (opens in a new tab); Encyclopaedia Britannica). Independent carrier: Britannica — Almagest, dated observations (https://www.britannica.com/topic/Almagest (opens in a new tab); Encyclopaedia Britannica).

Established: dated 127–141 observations in the Almagest. Not established: that a lost notebook is this same object. Established: a sourced public record of The Almagest records dated observations from 127 CE under Ptolemy’s name under 0127-03-26.

Shared responsibility is part of The Almagest records dated observations from 127 CE under Ptolemy’s name. Naming Ptolemy does not delete co-authors, institutions, or later transmitters. The lag from 0127-03-26 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.

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

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

Causal path

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

  1. ActorPtolemy
  2. contributed toFactThe Almagest records dated observations from 127 CE under Ptolemy’s name
  3. strengthensDriverDigital Learning Access
  4. weakensIndicatorLearning Poverty Rate (low- and middle-income countries)

Cite this page

Factrail. (2026). The Almagest records dated observations from 127 CE under Ptolemy’s name. Factrail. https://factrail.ai/facts/pto-observations-127

https://factrail.ai/facts/pto-observations-127

Accessed 16 October 2026.

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

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