Coherence Metrics and System-Level Organization in Planetary and Stellar Systems

This collection presents a coherence-based framework for the analysis of planetary and stellar systems, developed as a system-level extension of earlier work on coherence metrics, suppression gradients, and Solar System calibration. The formal basis for the framework is established in Coherence Metrics and Gradient Dynamics Across Planetary and Galactic Scales, which defines planetary coherence density, coherence gradient invariants, and scale-free organizational behavior across astrophysical regimes. The stellar-scale suppression environment relevant to planetary systems is further constrained in Solar Coherence: The Heliopause and Planetary Suppression Hierarchy, which characterizes the radial coherence influence imposed by host stars. Uniform application of these metrics to the Solar System is provided by the Solar System Planetary Coherence Compendium, which establishes calibrated reference values for planets, dwarf planets, and small bodies under a shared measurement framework. Building directly on these foundations, the present collection focuses on system-level coherence analysis, treating stellar systems as coherent environments within which planetary autonomy, subordinate structure (such as moons), and long-term organizational persistence may be inferred. Emphasis is placed on single-star systems with well-defined suppression gradients, enabling consistent classification of planetary architectures under shared physical constraints. Throughout the series, coherence is treated as a structural and organizational property rather than a proxy for habitability or biological potential. Definitions, equations, and scope conditions are stated explicitly to support long-term reuse, comparison, and extension as observational catalogs expand.