The origin of life is a planetary phenomenon whose elucidation demands integration of approaches spanning planetary science, geoscience, chemistry, and data science. This session explores processes that create, sustain, and modify environments from which life may emerge. We welcome contributions investigating geochemical and geophysical conditions on early Earth, Mars, and other planetary bodies, including redox processes across the atmosphere, hydrosphere, and lithosphere; impact cratering; hydrothermal activity; mineral–fluid interactions and surface catalysis relevant to prebiotic chemistry; and environmental processes that generate notable hallmarks of life such as homochirality and biopolymers. We further encourage submissions applying machine learning and computational techniques to the origins of life, as well as detection and characterization of biosignatures in remote sensing, in situ, and laboratory datasets. This session brings together theoretical, experimental, and observational work advancing our understanding of habitability and the planetary context for life's emergence across the solar system and beyond.