Version 4.0 — May 28, 2026

This article presents the Triple Phase Transition (TPT) theory of lunar formation — a fully internal mechanism requiring no external impactor and no synestia.

Submitted to Planetary Science Journal (AAS), manuscript #AAS77321, 27 May 2026.

Published preprint on EarthArXiv: https://doi.org/10.31223/X5XB6H


Interactive simulation (WebGL, real time): https://orion4622.github.io/moon-formation-triple-phase-transition/Animation_Formation_de_la_Lune_v2.html


The canonical giant impact model (Theia) and the synestia model both fail to explain the near-isotopic identity of Earth and Moon, the crustal dichotomy, and the 300 Myr delay of the terrestrial dynamo. The TPT addresses all three as mechanical consequences of a single driving force: progressive Fe-Ni segregation within a fully molten, rapidly rotating proto-Earth.

The model formulates 10 quantitative and falsifiable predictions. The central prediction — seismic interface at 200–315 km depth — will be tested by Chang’e 7 in August 2026. Artemis III (2028–2029) will collect mantle samples from the South Pole-Aitken basin.

All deposits and DOIs:

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