Earth: Day Zero · Paper 011 of 512
Defining the Exit Domain
If an entrance domain exists within the Earth: Day Zero reconstruction, an associated exit domain must also be evaluated. The framework therefore treats entrance and exit domains as linked geometric objects rather than isolated observations.
Operational Definition
An exit domain is defined as a candidate spatial region hypothesized to preserve macroscopic signatures associated with the terminal phase of a planetary-scale transit pathway.
The domain is evaluated through geometry, scale, structural context, and compatibility with the larger reconstruction framework.
Required Characteristics
A candidate exit domain should satisfy multiple independent criteria:
- appropriate planetary-scale dimensions;
- coherence within a great-circle reconstruction;
- compatibility with impact energetics;
- survivability across geological time;
- consistency with associated midpoint-domain relationships.
Constraint Hierarchy
The Earth: Day Zero framework does not begin by assuming a specific exit location. Instead, candidate regions are evaluated against progressively stricter geometric and physical constraints.
This reduces model freedom and prevents location selection from becoming arbitrary.
The Arctic Circle Candidate
The framework eventually evaluates the Arctic region as a candidate exit domain.
However, the purpose of this paper is not to defend that interpretation. The purpose is to establish the criteria that any candidate exit domain must satisfy before detailed evaluation begins.
The same standards applied to the Arctic Circle candidate must also apply to competing alternatives.
Research Collaboration
Published by Ontomics Research Library. Ontomics develops scientific frameworks, Earth–Moon system research, planetary science investigations, external R&D structures, technology transfer opportunities, and collaborative research programs.