{
 "id": "source/nasa-milankovitch-cycles",
 "class": "source",
 "slug": "nasa-milankovitch-cycles",
 "label": {
  "ar": "ناسا — دورات ميلانكوفيتش",
  "en": "NASA — Milankovitch cycles",
  "ur": "ناسا — میلانکووچ کے ادوار"
 },
 "summary": {
  "ar": "شرح حديث لاختلاف المركز والميل والترنح، للمقارنة لا لتوثيق معرفة الزرقالي.",
  "en": "Modern eccentricity, obliquity and precession explanation; comparison, not evidence of al-Zarqali's knowledge.",
  "ur": "اختلافِ مرکز، جھکاؤ اور تقدیم کی جدید وضاحت؛ تقابل، الزرقالی کے علم کا ثبوت نہیں۔"
 },
 "stub": false,
 "wings": [],
 "regions": [],
 "periods": [],
 "tags": [],
 "aliases": [],
 "themes": [],
 "data": {
  "kind": "secondary",
  "type": "website",
  "title": "Milankovitch (Orbital) Cycles and Their Role in Earth's Climate",
  "author": [
   {
    "literal": "NASA"
   }
  ],
  "publisher": "NASA Science",
  "language": "en",
  "URL": "https://science.nasa.gov/science-research/earth-science/milankovitch-orbital-cycles-and-their-role-in-earths-climate/",
  "open_access": true,
  "reliability_note": "Actually read eccentricity, obliquity and precession subsections,2026-11-06. Distinguishes axial and apsidal precession and modern orbital/climatic explanation. Use only for modern comparison, not a medieval source, exact historical rate, invariant contemporary ephemeris, climate prediction or causal genealogy from al-Zarqali. Article's date-specific distances/apsis dates not imported as permanently fixed values.",
  "status": {
   "review": "published",
   "completeness": 2,
   "generated_by": "Copilot SDK in VS Code"
  },
  "provenance": {
   "generated_by": "Copilot SDK in VS Code",
   "model": "unknown",
   "run": "inventions-p3-b52",
   "source": "Actual institutional modern explanatory text, selected named subsections, not search summary"
  }
 },
 "prose": {},
 "degree": 0,
 "contemporaries": [],
 "updated": "2026-11-06",
 "connections": [],
 "related": [],
 "license": {
  "prose": "CC BY-SA 4.0",
  "data": "CC0 1.0"
 }
}