Solar activity drives space weather throughout the heliosphere, yet predictive capabilities beyond Earth remain limited. As solar transients, including coronal mass ejections (CMEs), shocks, and co-rotating interaction regions (CIRs), propagate outward interacting with other solar wind structures, their evolution introduces major uncertainties in arrival time, structure, and geoeffectiveness at planetary and space locations. Recent advances from missions such as Parker Solar Probe and Solar Orbiter provide new opportunities to constrain these processes, but challenges remain in translating them into actionable forecasts.

This session focuses on the end-to-end chain from solar origin to operational prediction beyond Earth, emphasizing uncertainty quantification, model–data integration, and decision-relevant forecasting. We invite contributions addressing the transferability of Earth-based frameworks to environments such as Mars and deep space, including implications for timelines, risk assessment, and forecast reliability.

• P - Planetary Sciences