Terrestrial networks is a research domain concerned with the analysis of interconnected systems and concepts pertaining to nuclear energy and physics as they are established and studied on Earth. This field investigates both the physical infrastructure, such as reactor grids and research facilities, and the complex web of theoretical models and experimental data that underpin our understanding of terrestrial nuclear processes. Key characteristics include the study of operational dependencies and scientific coherence across these elements, significant for advancing the safe and efficient utilization of nuclear phenomena on a planetary scale.