2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/224893The equations of motion for matter in non-Riemannian spacetimes are derived via a multipole method. It is found that only test bodies with microstructure couple to the non-Riemannian spacetime geometry. Consequently it is impossible to detect spacetime torsion with the satellite experiment Gravity Probe B, contrary to some recent claims in the literature.8 pages, 1 figure, matches published version including the erratum in Phys. Lett. A 373 (2009) 1600General Relativity and Quantum CosmologyAstrophysicstext