2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/104454Approximate equations are derived for the motion of a gyroscope on the earth's gravitational field using the Einstein, Infeld, Hoffmann surface integral method. This method does not require a knowledge of the energy-momentum-stress tensor associated with the gyroscope and uses only its exterior field for its characterization. The resulting equations of motion differ from those of previous derivations.typos repaired, cosmetic cleanup. Added paragraph describing results of spin-spin interaction calculationGeneral Relativity and Quantum Cosmologytext