兰德-绘制宇宙图-新太空时代的操作占星术（英）-2025_33页_2mb

Astrographic Framework for the New Space Era

Definition: A system delineating four key outer space regions (Surface Environment, Near-Body Space, Celestial Neighborhood, Deep Space) to enable clear communication and policy-making across diverse stakeholders in the space domain.

Key Components

1. Four Astrographic Regions:

   • Surface Environment: Area within a celestial body's "minorbit" sphere (lowest stable orbit). Includes planetary surface, subsurface, and atmosphere up to minorbit.
   • Near-Body Space: Region between a celestial body's minorbit sphere and its farthest stable orbit (Keplerian fanimiet).
   • Celestial Neighborhood: Space primarily influenced by a given gravitational system's constituent bodies (e.g., Cislunar Space).
   • Deep Space: All space outside a defined celestial neighborhood.

2. Core Principles:

   • Accessibility: Framework defined with appropriate technical detail for non-specialist policymakers (analogous to accessibility of "aeronautical/astronautic" regimes).
   • Durability: Boundaries anchored in durable physical thresholds or established conventions.
   • Generalizability: Designed to apply beyond the specific Earth-Moon case to any gravitational system.

3. Foundational Concepts: Critical mapping elements include minorbit spheres, atmospheric considerations, Lagrange zones, reference frames, and Hill spheres.

4. Cislunar Example: Given a specific definition for Earth-Moon Lagrange Points (EML).

   • Surface Environment: Earth's surface +/- 100 km, Moon's surface +/- 100 m.
   • Near-Body Space: Earth from 100 km to 50,000 km, Moon from 100 m to ~60,000 km.
   • Celestial Neighborhood (Cislunar Space): The volume where Earth's gravitational influence predominates (~1.5 million km from Earth's center).
   • Deep Space: Everything beyond the Cislunar region.

5. Opportunities for Enhancement: The authors identify areas for future refinement:

   • Incorporating three-body dynamics (e.g., in the complex Earth-Moon system).
   • Employing multidimensional representations (beyond static 2D maps) for better usability.
   • Expanding the framework with additional regions or features as needed.

Summary

The authors propose a framework for defining and communicating distinct operational regions within outer space, primarily focusing on the Earth-Moon system. This framework, based on principles derived from geography and cartography adapted for space, defines four key regions (Surface Environment, Near-Body Space, Celestial Neighborhood, Deep Space). The goal is to provide accessible definitions crucial for policy-making, mission planning, and operational safety as space activities intensify in complexity. Key elements include using established thresholds like "minorbit" spheres, defining boundaries using concepts like Hill spheres, and acknowledging the critical role of Lagrange zones in multi-body systems. The framework is intentionally designed to be generalizable beyond the Earth-Moon system and durable enough to adapt to future needs, with clear opportunities for enhancement noted.