The Moon
Measured on the far side by Chang'e-4 — about 200 times the dose you take standing on Earth, and 2.6 times what a crew takes on the ISS.
Surface conditions on The Moon
Every figure below is tagged with where it came from. Measured means an instrument read it on or at the body; modeled means it was computed and never directly observed.
What it would take to settle The Moon
No world off Earth is habitable — the honest habitable fraction of every surface here is zero. What can be answered is how far each one sits from Earth along the seven axes a habitat has to buy its way out of. The Moon scores 29.1 out of 100, on 100% coverage of the axes. The single worst axis here is pressure (1e-15 bar (vacuum)); the one that most sets The Moon apart from the other thirteen is pressure.
Below the Armstrong limit (0.062 bar) body fluids boil at body temperature — the difference between needing a mask and needing a pressure vessel. Above 1 bar the problem inverts into containment, and Venus at 92 bar has never let a lander live two hours.
Shielding is mass, and mass is the single most expensive thing to move. Above roughly 1 mSv/day a surface habitat has to be buried.
Both directions cost power continuously. A cold world burns reactor output to stay warm; a hot one has no cold sink to dump heat into at all.
Nobody has ever measured long-term human health at any gravity between 0 and 1 g. Below about 0.1 g, anchoring anything — including yourself — becomes the design driver.
Who has been to The Moon
Six crewed landings, twelve people, the last in December 1972. Nobody has been back.
Unprotected survival: About 15 seconds of useful consciousness before hypoxia.
Ice in permanently shadowed polar craters — LCROSS impact plume 2009, Chandrayaan-1 M3 spectra, SOFIA detection in sunlit soil 2020.
The named places on The Moon
The IAU has approved 9,086 names on The Moon, each drawn from a theme the naming committee chose for this world. Every name in the scene above is one of them, placed at its catalogued coordinates.
Sources
- LRO LROC WAC — LRO WAC global mosaic, 100 m/px (NASA Trek / USGS Astrogeology)
- IAU / USGS Gazetteer of Planetary Nomenclature
- Zhang et al. 2020, Science Advances — first lunar surface dosimetry
- LRO LROC WAC global mosaic
Imagery is public-domain NASA/USGS mission data, streamed live from NASA Trek as a plate-carrée tile pyramid and draped on our own sphere — no third-party globe library and no cached copy of anyone else's map.