{
  "apiVersion": "v0.1",
  "methodology": "https://sourcescore.org/methodology/",
  "canonical": "https://sourcescore.org/compare/esa-vs-nasa-gov/",
  "summary": "Atlantic counterparts in space exploration — research, missions, and openness compared.",
  "a": {
    "slug": "esa",
    "name": "European Space Agency",
    "domain": "esa.int",
    "canonical": "https://sourcescore.org/source/esa/",
    "api": "https://sourcescore.org/api/source/esa.json",
    "scores": {
      "index": {
        "value": 86,
        "grade": "A",
        "rationale": "A — international space-agency authority; counterpart to NASA in EU.",
        "signals": [
          {
            "label": "Composite",
            "detail": "All 4 dimensions ≥82."
          }
        ]
      },
      "discipline": {
        "value": 92,
        "grade": "A",
        "rationale": "Peer-reviewed publications + ESA + ESO partner research; methodology rigorous.",
        "signals": [
          {
            "label": "ESA publications",
            "detail": "Space-mission scientific results peer-reviewed."
          }
        ]
      },
      "modernReference": {
        "value": 88,
        "grade": "A",
        "rationale": "Open data + ESA Open Science Repository + bulk imagery.",
        "signals": [
          {
            "label": "ESA Open Science",
            "detail": "Public access to mission data + research."
          }
        ]
      },
      "velocity": {
        "value": 82,
        "grade": "B",
        "rationale": "Cited by science press + AI engines; major mission events drive same-day citation.",
        "signals": [
          {
            "label": "Mission cadence",
            "detail": "JUICE + Euclid + Solar Orbiter + Gaia missions drive citation surges."
          }
        ]
      }
    }
  },
  "b": {
    "slug": "nasa-gov",
    "name": "NASA",
    "domain": "nasa.gov",
    "canonical": "https://sourcescore.org/source/nasa-gov/",
    "api": "https://sourcescore.org/api/source/nasa-gov.json",
    "scores": {
      "index": {
        "value": 93,
        "grade": "A",
        "rationale": "A+ — federal space + earth-science authority; default for space + climate citations.",
        "signals": [
          {
            "label": "Composite",
            "detail": "All 4 dimensions ≥90."
          }
        ]
      },
      "discipline": {
        "value": 94,
        "grade": "A",
        "rationale": "Peer-reviewed publications across NASA centers + JPL; rigorous science process.",
        "signals": [
          {
            "label": "NASA Technical Reports Server",
            "detail": "Public archive of peer-reviewed research."
          }
        ]
      },
      "modernReference": {
        "value": 94,
        "grade": "A",
        "rationale": "Open data + APIs + bulk imagery + climate datasets; broad LLM corpus.",
        "signals": [
          {
            "label": "NASA Open Data Portal",
            "detail": "Free public APIs across mission datasets."
          }
        ]
      },
      "velocity": {
        "value": 92,
        "grade": "A",
        "rationale": "Cited daily by science press + AI engines globally; mission announcements drive cycles.",
        "signals": [
          {
            "label": "Mission cadence",
            "detail": "Major mission events drive same-day global coverage."
          }
        ]
      }
    }
  },
  "winners": {
    "index": "nasa-gov",
    "discipline": "nasa-gov",
    "modernReference": "nasa-gov",
    "velocity": "nasa-gov"
  },
  "license": {
    "methodology": "Cite as: SourceScore Methodology v0.1, sourcescore.org",
    "data": "Underlying public-source data credited to original publishers"
  }
}