
Classic Moon-formation simulations typically produced a ring of debris that assembled over months or years after a Mars-sized world struck early Earth. But simulations published in September 2026 that included temperature-dependent rock strength found that, under certain conditions, a coherent Moon-sized satellite could emerge in roughly five hours.
A September 2026 impact study found that strength retained by hot, partly solid rock can redirect Theia’s rebound and capture a coherent satellite within hours.
By Terra Daily Editorial Team · Sep 13, 2026















