{
  "annotation_id": "03f53b94-00c0-4bb5-a112-9b2a201b3215",
  "date_created": "2026-03-02T18:00:53.735000Z",
  "date_modified": "2026-03-02T18:00:53.735000Z",
  "file_hash": "e9702fe3ecf1e50525c6da735ebb5949ead8bbd86eca1497a42460c94ba3156a",
  "private": false,
  "record": {
    "abstract": "A surprisingly large amount of information on our solar system can be gained\nfrom simple measurements of the apparent angular diameters of the sun and the\nmoon. This information includes the average density of the sun, the distance\nbetween earth and moon, the radius of the moon, and the gravitational constant.\nIn this note it is described how these and other quantities can be obtained by\nsimple earthbound measurements of angles and times only, without using any\nexplicit information on distances between celestial bodies. The pedagogical and\nhistorical aspects of these results are also discussed briefly.",
    "arxiv_id": "physics/0412134",
    "authors": [
      "K. Capelle"
    ],
    "categories": [
      "physics.ed-ph",
      "physics.hist-ph"
    ],
    "doi": "10.1088/0143-0807/25/5/003",
    "journal_ref": "Eur. J. Phys. 25, p.605 (2004)",
    "title": "Surveying the solar system by measuring angles and times: from the solar   density to the gravitational constant",
    "url": "https://arxiv.org/abs/physics/0412134"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "1e658e2c-3be7-4587-b35a-6a3219dea089",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}