2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/207568We show that the anomalous acceleration of the Pioneer 10/11 spacecraft can be explained if there is some mirror gas or mirror dust in our solar system.Latex, 7 pages, accepted in Phys. Lett.BHigh Energy Physics - PhenomenologyAstrophysicsGeneral Relativity and Quantum CosmologyA mirror world explanation for the Pioneer spacecraft anomalies?text