{
  "title": "Check my math: Moon closer to Earth",
  "description": "Each step of the Moon-at-half-distance chain: formula, input, result, units, source number and URL, source type, whether we recomputed it, and its Seeing mark. Third-party values are single figures restated from the sources listed in each row.",
  "license": "CC BY 4.0",
  "license_url": "https://creativecommons.org/licenses/by/4.0/",
  "creator": "The What-If Observatory",
  "page": "https://whatifobservatory.com/what-if/moon-closer-to-earth/",
  "derived_from": [
    "Murphy 2013",
    "Williams, Turyshev & Boggs",
    "IAU 2015 Resolution B3",
    "USGS lunar data standards",
    "NOAA Tides and Currents Glossary",
    "Rappaport et al. 2013",
    "Agrusa & Michel 2026",
    "Caimmi 2018",
    "Farhat et al. 2022"
  ],
  "method": "Compiled by The What-If Observatory from the data listed"
}