{
 "id": "source/roberts-shatir-1957",
 "class": "source",
 "slug": "roberts-shatir-1957",
 "label": {
  "ar": "روبرتس: نظرية ابن الشاطر الشمسية والقمرية",
  "en": "Roberts: Ibn al-Shatir's solar and lunar theory",
  "ur": "رابرٹس: ابن شاطر کا شمسی و قمری نظریہ"
 },
 "summary": {
  "ar": "دراسة 1957 لشاهد مخطوط، تتضمن نموذج القمر بفلكي تدوير ومقارنة كوبرنيكوس وحدود الانتقال.",
  "en": "1957 manuscript-based study of the double-epicycle Moon and comparison with Copernicus, with transmission limits.",
  "ur": "مخطوطے پر مبنی 1957 کا دو تدويری دائروں والا قمری مطالعہ، کوپرنیکس سے تقابل اور انتقال کی حدود۔"
 },
 "stub": false,
 "wings": [],
 "regions": [],
 "periods": [],
 "tags": [],
 "aliases": [],
 "themes": [],
 "data": {
  "kind": "secondary",
  "type": "article-journal",
  "title": "The Solar and Lunar Theory of Ibn ash-Shatir: A Pre-Copernican Copernican Model",
  "author": [
   {
    "family": "Roberts",
    "given": "Victor"
   }
  ],
  "publisher": "Isis48(4), December1957, pp428–432; University of Chicago Press for the History of Science Society",
  "issued": {
   "date-parts": [
    [
     1957,
     12
    ]
   ]
  },
  "language": "en",
  "URL": "https://www.jstor.org/stable/227515",
  "reliability_note": "Complete actual five-page article read in six-page Kenyon-hosted PDF (cover plus428–432), https://www2.kenyon.edu/Depts/Math/Aydin/Teach/Fall21/128/PreCopernican.pdf ; printed431–432/Figure2 visually checked. Roberts used microfilm of Bodleian Marsh139, reported768AH/1366 copy; museum has not read manuscript. Radii60,6;35,1;25; resultant5;10–8;0; syzygy54;50–65;10, quadrature52–68. TDV's43;50 differs, not harmonized. Article's reconstruction/modern symbols and calculated diameter extremes not silently assigned as original manuscript values.1957 transmission question unresolved; later King interpretation separately attributed. No figure or source text republished; PDF/OCR outside git.",
  "status": {
   "review": "published",
   "completeness": 3,
   "generated_by": "Copilot SDK in VS Code"
  },
  "provenance": {
   "generated_by": "Copilot SDK in VS Code",
   "model": "unknown",
   "run": "inventions-p3-b64",
   "source": "Actual complete scholarly article, printed figure/numbers visually checked, not search-generated numeric synopsis"
  }
 },
 "prose": {},
 "degree": 0,
 "contemporaries": [],
 "updated": "2026-11-06",
 "connections": [],
 "related": [],
 "license": {
  "prose": "CC BY-SA 4.0",
  "data": "CC0 1.0"
 }
}