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Search 3,721 documents across 34 fields — every claim tier-rated by evidence

3,721 Documents 34 Sections 43,625 Citations 34,852 Keywords Indexed 4 Evidence Tiers

3,633 are the core, quality-scored corpus (34 lettered sections — see How We Work); the remaining 88 are cross-corpus synthesis documents (68 InterDocs, 12 Connections, 8 Theories) also indexed here.

67 results for "astronomical tables" — page 4 of 4

ZH_2_15 Verified Archaeoastronomy

ZH_2_15 — Astronomical Time: Defining Days, Years, Hours, and the Second

The measurement and definition of time is humanity's oldest astronomical enterprise — and one that has undergone a radical transformation from celestial observation to atomic precision. The fundamental units derive from

time measurement solar day sidereal day tropical year sidereal year Julian year

ZH_1_12 Verified Archaeoastronomy

ZH_1_12 — Astronomical Instruments: Astrolabe, Armillary, Quadrant

The history of astronomical instruments — devices for measuring the positions, motions, and timing of celestial bodies — is inseparable from the history of astronomy itself. From the gnomon (the simplest shadow-casting s

astrolabe armillary sphere quadrant sextant gnomon sundial

D_3_22 Verified Sites & Artifacts

D_3_22 — Great Serpent Mound: Astronomical Analysis and Cultural Context

The Great Serpent Mound is a 411-meter-long (1,348 ft) serpentine effigy earthwork in Adams County, Ohio, situated on a plateau overlooking Brush Creek — the largest surviving effigy mound in the world. The mound takes t

Great Serpent Mound effigy mound Ohio Fort Ancient Adena solstice

F_3_16 Credible Lost Connections

F_3_16 — Ancient Astronomical Knowledge Transfer: East to West

The transfer of astronomical knowledge from East to West — from Mesopotamian/Babylonian, Egyptian, Indian, and Persian traditions through Greek, Hellenistic, and Islamic intermediaries to medieval and Renaissance Europe

astronomy knowledge transfer Babylonian Egyptian Greek Indian

A_3_20 Speculative Foundations

A_3_20 — Dogon Cosmological Knowledge

The Dogon are a West African people numbering approximately 800,000, living primarily on the Bandiagara Escarpment and surrounding plateau in Mali. Their remarkably detailed cosmological and astronomical knowledge became

Dogon Sirius Sirius B Nommo Griaule Ogotemmêli

ZH_2_11 Credible Archaeoastronomy

ZH_2_11 — Southeast Asian Astronomy: Thai, Burmese, Khmer, and Indonesian Traditions

The astronomical traditions of Southeast Asia — Thailand (Siam), Myanmar (Burma), Cambodia (Khmer), Java, Bali, and the wider Malay-Indonesian archipelago — represent a distinctive synthesis of Indian, indigenous, and (i

Southeast Asian astronomy Thai astronomy Burmese astronomy Khmer astronomy Indonesian astronomy Angkor Wat

ZH_1_08 Verified Archaeoastronomy

ZH_1_08 — Sundials, Gnomons, and Ancient Timekeeping Devices

The gnomon — a vertical stick, pillar, or edge that casts a shadow — is arguably the oldest scientific instrument in human history, requiring nothing more than a straight object placed in sunlight to measure time, determ

sundial gnomon horologium scaphe hemicyclium shadow clock

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