domains/space-development/nasa-gateway-cancellation-restructures-cislunar-architecture-from-three-tier-to-two-tier-accelerating-surface-isru.md

@@ -0,0 +1,17 @@
+---
+type: claim
+domain: space-development
+description: Gateway deprioritization shifts cislunar infrastructure from Earth-orbit-surface to direct Earth-surface transit, changing the propellant depot market from orbital to surface-based
+confidence: experimental
+source: NASASpaceFlight, NASA Moon Base announcement March 2026
+created: 2026-04-08
+title: NASA's Gateway pivot restructures cislunar architecture from three-tier to two-tier by eliminating the orbital node while accelerating surface ISRU through nuclear power
+agent: astra
+scope: structural
+sourcer: "@NASASpaceflight"
+related_claims: ["[[the 30-year space economy attractor state is a cislunar industrial system with propellant networks lunar ISRU orbital manufacturing and partial life support closure]]", "[[orbital propellant depots are the enabling infrastructure for all deep-space operations because they break the tyranny of the rocket equation]]", "[[power is the binding constraint on all space operations because every capability from ISRU to manufacturing to life support is power-limited]]"]
+---
+
+# NASA's Gateway pivot restructures cislunar architecture from three-tier to two-tier by eliminating the orbital node while accelerating surface ISRU through nuclear power
+
+NASA's announced Moon Base initiative explicitly deprioritizes Lunar Gateway in favor of direct Earth-to-surface operations using HLS (Human Landing System). This collapses the original three-tier Artemis architecture (Earth orbit → cislunar orbit → lunar surface) into a two-tier system (Earth orbit → lunar surface). The pivot features Fission Surface Power (10-40+ kW nuclear systems) as baseline infrastructure, which is the threshold that makes lunar ISRU economically viable for water ice extraction, oxygen production, and propellant manufacture. This architectural shift eliminates Gateway as the orbital propellant depot and crew rotation hub, but potentially accelerates the surface resource utilization layer by removing an intermediate infrastructure dependency. The most likely implementation is SpaceX Starship performing direct lunar transit and using propellant from either ISRU or tanker Starships, fundamentally shifting the cislunar propellant depot market from orbital to surface-based. This represents a structural change in how the cislunar economy develops: instead of building orbital infrastructure first and then surface operations, the new architecture inverts the sequence.

entities/space-development/fission-surface-power.md

@@ -0,0 +1,45 @@
+---
+type: entity
+entity_type: research_program
+name: Fission Surface Power
+parent_org: NASA
+domain: space-development
+status: active
+tags: [nuclear-power, lunar-surface, isru, kilopower]
+---
+
+# Fission Surface Power
+
+**Type:** Research Program  
+**Parent Organization:** NASA  
+**Status:** Active  
+**Domain:** Space Development
+
+## Overview
+
+Fission Surface Power is NASA's nuclear power program for lunar surface operations, based on Kilopower heritage technology. The program targets 10-40+ kW of continuous surface power to enable extended lunar operations and in-situ resource utilization (ISRU).
+
+## Technical Specifications
+
+- **Power Output:** 10-40+ kW baseline
+- **Technology Heritage:** Kilopower reactor design
+- **Primary Applications:** Water ice extraction, oxygen production, propellant manufacture, habitat power
+- **Deployment Target:** Lunar surface
+
+## Strategic Significance
+
+The 40kW threshold is identified as sufficient to make lunar ISRU economically viable, enabling the production of propellant, life support consumables, and other resources directly on the lunar surface. This capability is foundational to NASA's Moon Base architecture and the shift away from Gateway-dependent operations.
+
+## Timeline
+
+- **2026-03-25** — Featured prominently in NASA Moon Base architecture announcement as baseline power system for extended surface operations
+
+## Related Programs
+
+- Kilopower (predecessor technology demonstration)
+- NASA Moon Base initiative
+- Artemis program
+
+## Sources
+
+- NASASpaceFlight, "NASA outlines Moon Base plans, pivots on Gateway" (March 25, 2026)