diff --git a/src/app/features/body-detail/body-readouts.ts b/src/app/features/body-detail/body-readouts.ts
index 9953ade..82ff9a7 100644
--- a/src/app/features/body-detail/body-readouts.ts
+++ b/src/app/features/body-detail/body-readouts.ts
@@ -72,12 +72,17 @@ export function bodyReadouts(body: BodyDetailViewModel): BodyReadouts {
 /**
  * The derived surface is a reasoned illustration, and a panel of real measurements sitting next
  * to it is exactly the context in which it could be mistaken for another one.
+ *
+ * Only an exoplanet has never been imaged. A moon or dwarf planet drawn this way has been — Voyager
+ * 2 photographed Uranus's five large moons, Proteus and Nereid, Cassini Hyperion, and Hubble sees
+ * Eris, Haumea and Makemake as points — but has no global map this app can use.
  */
 function provenanceFor(body: BodyDetailViewModel): string {
   if (body.hasPhotography) {
     return 'Surface: NASA/ESA/USGS photography.';
   }
+  const why = body.kind === 'exoplanet' ? 'no image of this world exists' : 'no global map of this world is used here';
   return body.appearance.equilibriumTemperatureK === null
-    ? 'Surface illustrated from this body’s measured size and mass. Its host star is not in the catalogue, so no temperature could be derived. Not an observation — no image of this world exists.'
-    : 'Surface illustrated from the measurements above — size, density and the temperature derived from its star’s output and its orbit. Not an observation — no image of this world exists.';
+    ? `Surface illustrated from this body’s measured size and mass. Its host star is not in the catalogue, so no temperature could be derived. Not an observation — ${why}.`
+    : `Surface illustrated from the measurements above — size, density and the temperature derived from its star’s output and its orbit. Not an observation — ${why}.`;
 }
diff --git a/src/app/features/body-detail/body-view-model.spec.ts b/src/app/features/body-detail/body-view-model.spec.ts
index 91a1e69..8c96c22 100644
--- a/src/app/features/body-detail/body-view-model.spec.ts
+++ b/src/app/features/body-detail/body-view-model.spec.ts
@@ -72,6 +72,19 @@ describe('buildBodyViewModel', () => {
     expect(bodyReadouts(buildBodyViewModel('luna', catalogues)!).provenance).toContain('Orbit: JPL SSD satellite mean elements, epoch 2000 Jan 1.');
   });
 
+  it('says a moon without a map is illustrated, without saying it was never imaged', () => {
+    // luna has no map under that id. Voyager and Cassini photographed every moon drawn this way.
+    const provenance = bodyReadouts(buildBodyViewModel('luna', catalogues)!).provenance;
+    expect(provenance).toContain('Not an observation — no global map of this world is used here.');
+    expect(provenance).not.toContain('no image of this world exists');
+  });
+
+  it('says an exoplanet has never been imaged', () => {
+    const exoplanet: ExoplanetRecord = { id: 'x', hostStarId: SUN_STAR_ID, hostStarName: 'Sol', name: 'X b', orbit: { semiMajorAxisAu: 0.05 } };
+    const model = buildBodyViewModel('x', { bodies: [], exoplanets: [exoplanet], stars: [sun] })!;
+    expect(bodyReadouts(model).provenance).toContain('Not an observation — no image of this world exists.');
+  });
+
   it('marks a published exoplanet period as measured, not derived', () => {
     const exoplanet: ExoplanetRecord = {
       id: 'kepler-22-b',