Home›Sources›Almagest (Mathematike Syntaxis)SourcesAlmagest (Mathematike Syntaxis)Citation FormatsGeneral ReferenceGeneral Reference Citation TextDivinity Atlas. "Almagest (Mathematike Syntaxis)." Accessed August 30, 2026. https://divinity.interactivelion.com/sources/almagest-mathematike-syntaxis.Copy General ReferenceAPA StyleAPA Style Citation TextDivinity Atlas. (n.d.). Almagest (Mathematike Syntaxis). Retrieved August 30, 2026, from https://divinity.interactivelion.com/sources/almagest-mathematike-syntaxisCopy APA StyleBibTeXBibTeX Citation Text@misc{divinityatlas-almagest-mathematike-syntaxis, author = {Divinity Atlas}, title = {Almagest (Mathematike Syntaxis)}, year = {2026}, url = {https://divinity.interactivelion.com/sources/almagest-mathematike-syntaxis}, note = {Accessed August 30, 2026} }Copy BibTeXClaudius Ptolemy's astronomical treatise, distinct from his separate astrological work Tetrabiblos, recording in Book VII his measurement of the precession of the equinoxes and crediting the earlier astronomer Hipparchus with the original discovery. As a primary ancient scientific text it sits at this atlas's top tier for documenting the actual content and history of ancient astronomical measurement. It is strong evidence for what ancient astronomers measured and how they credited earlier discoveries among themselves. Its date is approximate, as is usual for an ancient text transmitted through later manuscript copies, and a claim about later astronomical corrections to Ptolemy's figures needs its own separate source.FactsClaims Backed By This Source (444 claims)Comments (0)Reader Challenges (0 open reader challenges)FactsAssessmentReliability TierWell-attested1Claudius Ptolemy's own primary astronomical treatise, distinct from his separate astrological Tetrabiblos, recording his measurement of the precession of the equinoxes and crediting the earlier astronomer Hipparchus with the discovery.NotesWell-attestedPtolemy's astronomical treatise, distinct from his astrological Tetrabiblos. Book VII records and measures the precession of the equinoxes, crediting the discovery to Hipparchus. Approximate date. Public domain.CitationAuthorWell-attestedClaudius PtolemyPublisherWell-attestedSpringer-VerlagPublication YearWell-attested150URLWell-attestedhttps://archive.org/details/ptolemysalmagest0000ptolSource TypeWell-attestedprimary-textClaims Backed By This Source (444 claims)This source backs 444 claims across the atlas. As facts: 363 well-attested. As cited relationships: 4 holds. Plus 77 entities citing it as a general reference with no single fact or relationship attached.Disposition By TopicFixed Stars, 218 claims: 182 well-attested, 36 general references.Constellations, 150 claims: 111 well-attested, 1 holds, 38 general references.Articles, 49 claims: 49 well-attested.Esoteric Texts, 13 claims: 10 well-attested, 2 holds, 1 general references.Sources, 8 claims: 8 well-attested.Doctrines, 5 claims: 3 well-attested, 1 holds, 1 general references.Historical Figures, 1 claims: 1 general references.Well-attested363ArticlesA Red Supergiant, and the 2019 DimmingAlpha Andromedae, and a Shared CornerAlpha Aquilae, a Nearby Fast RotatorAlpha Canis Minoris, Before the DogAlpha Centauri, the Nearest of AllAlpha Coronae Borealis, the Jewel of the CrownAlpha Cygni, One of the Most Luminous StarsAlpha Eridani, the End of the RiverAlpha Geminorum, Which Is Six StarsAlpha Hydrae, the Solitary OneAlpha Lyrae, and the Zero PointAlpha Ophiuchi, the Head of the HealerAlpha Pegasi, a Corner of the Great SquareAlpha Serpentis, the Serpent's NeckAlpha Tauri, MeasuredBeta Andromedae, a Red GiantBeta Centauri, a Pointer to the CrossBeta Geminorum, the Brighter TwinBeta Leonis, the Lion's TailBeta Orionis, Brighter Than AlphaBeta Pegasi, a Variable Red GiantBeta Tauri, a Horn Shared with the CharioteerGamma Andromedae, the Celebrated DoubleGamma Orionis, the Amazon StarNot the Pole Star in Ptolemy's DayOnce and Future Pole StarOut of Leo, in 2012Reading the Position: Aquarius 0 Degrees 26 Minutes, a Very Recent ArrivalReading the Position: Aquarius 4 Degrees 55 MinutesReading the Position: Aries 22 Degrees 2 MinutesReading the Position: Capricorn 16 Degrees 3 MinutesReading the Position: Capricorn 19 Degrees 48 Minutes, and Not a DuplicateReading the Position: Taurus 10 Degrees 29 Minutes, and a Star Listed TwiceReading the Position: Taurus 12 Degrees 26 Minutes, at a BoundaryReading the Position: Taurus 6 Degrees 25 MinutesSaturn and Venus, and a Star the Tradition Barely UsesThe Bear-Guard, and a Star From Somewhere ElseThe Beehive, a Cluster Mistaken for a StarThe Brightest of the PleiadesThe Brightest Star, and WhyThe Cosmology Three Religions AssumedThe Heart of the Lion, and a Star Being Flung ApartThe Lonely One, and a Disputed PlanetThe Machinery of the Old HeavenThe Second Brightest Star, Invisible from Most of EuropeThe She-Goat, Which Is Four StarsThe Star That Revealed PrecessionThirteen Books for a Universe of Nested SpheresWhy the Zodiac Is a Set at AllConstellationsAndromedaShowing 1 to 50 of 126 entities carrying this claim. NextHolds4ConstellationsZodiacDoctrinesThe Celestial SpheresEsoteric TextsAlmagestGeneral References77ConstellationsAndromedaAquilaAraArgoAurigaBootesCanis MajorCanis MinorCassiopeiaCentaurusCepheusCetusCorona AustralisCorona BorealisCorvusCraterCruxCygnusDelphinusDracoEquuleusEridanusHerculesHydraLepusLupusLyraOphiuchusOrionPegasusPerseusPisces AustralisSagittaSerpensTriangulumUrsa MajorUrsa MinorZodiacDoctrinesThe Celestial SpheresEsoteric TextsAlmagestFixed StarsAchernarAgenaAlcyoneAldebaranAlmachAlphardAlpheccaAlpheratzAltairAntaresShowing 1 to 50 of 77 entities carrying this claim. NextComments (0)No comments yet. Be the first to share a thought.Sign in to join the discussion.Reader Challenges (0 open reader challenges)No disputes yet. Spotted an error or a better source? Open the first one.Sign in to dispute this or suggest a correction.View At A Past YearThe atlas records no dated fact of its own for this entry, so there is no other year to choose.Show This Year