地球与行星天体物理：2025–2026 年度综述

An annual survey of the astro-ph.EP arXiv category, covering research published from September 2025 – August 2026. Built on a close-reading set of 132 papers and organised into 37 chapters, it maps the year by the field's research sub-directions.

Book framework (share of the year's output):

• Exoplanet Characterization and Formation Inference (28.2%) — Focuses on understanding exoplanet properties, atmospheres, and formation processes through observational data and machine learning inference.
• Protoplanetary and Debris Disk Dynamics (22.2%) — Investigates the structure, composition, and dynamical evolution of protoplanetary and debris disks, including dust trapping and gas kinematics.
• Small Body Dynamics and Planetary Environments (19.1%) — Examines the origins, interactions, and environmental impacts of asteroids, comets, and small bodies within planetary systems.
• Exoplanet Detection and Direct Imaging Surveys (14.6%) — Covers survey strategies, transit detection, direct imaging discoveries, and the search for habitable or technosignature-bearing worlds.
• High-Resolution Spectroscopy and Atmospheric Retrieval (5.2%) — Utilizes JWST and ground-based high-resolution spectroscopy to characterize exoplanet atmospheres and refine spectral retrieval techniques.
• Planetary Structure, Interiors, and Molecular Lines (3.9%) — Constrains planetary interiors, thermal structures, and cloud properties using molecular line data and empirical structure models.
• Orbital Dynamics and Tidal Evolution (2.9%) — Studies orbital architectures, tidal interactions, migration, and dynamical stability of planetary systems, particularly hot and warm Jupiters.
• Radial Velocity Techniques and Stellar Activity (1.8%) — Develops and applies radial velocity methods to detect exoplanets while mitigating stellar activity signals and improving precision.
• Brown Dwarfs and White Dwarf Planetary Debris (1.3%) — Explores the formation, atmospheres, and dynamical interactions of brown dwarfs and planetary debris around white dwarfs.
• Numerical Simulations of Planetary and Stellar Physics (0.5%) — Applies numerical codes and simulations to model particle distributions, convection, shock physics, and atmospheric processes in planetary contexts.
• Recent Evidence and Implications in Planetary Science (0.1%) — Highlights recent observational evidence and implications for Earth rotation, solar irradiance, and exoplanet habitability scenarios.

Each sub-direction is covered across three chapters — how it framed its questions, the strength of its key findings, and its open debates and frontiers — so the reader gets a traceable picture of what this part of the field actually produced over the year.