Mars' triaxiality came from a tidal bulge raised by a synchronous moon Nerio whose orbit became unstable due to solar tides and a palaeo ocean, leading to its inward spiral, destruction during the LHB, and a spin adjustment that roughly matches Mars' current rotation.
Sergei Kopeikin, Michael Efroimsky, and George Ka- plan
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The demise of the synchronous moon that gave Mars its triaxiality. The role of solar tides and a palaeo ocean
Mars' triaxiality came from a tidal bulge raised by a synchronous moon Nerio whose orbit became unstable due to solar tides and a palaeo ocean, leading to its inward spiral, destruction during the LHB, and a spin adjustment that roughly matches Mars' current rotation.