2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/8071Dark matter annihilations can generate significant amounts of internal heat inside planets if dark matter consists mainly of particles with nuclear cross sections in the micro-barn range or larger (SIMPs). By considering a detailed model of Uranus's interior, we calculate upper limits on the S-wave annihilation cross section for these particles as a function of their mass. These upper limits, together with other experimental and theoretical constraints, rule out SIMPs with masses between 150 MeV and $10^{4}$ GeV.6 REVTeX pages, version accepted by PRDAstrophysicsHigh Energy Physics - Phenomenologytext