astra: extract claims from 2026-03-XX-spacecomputer-orbital-cooling-landscape-analysis

- Source: inbox/queue/2026-03-XX-spacecomputer-orbital-cooling-landscape-analysis.md
- Domain: space-development
- Claims: 1, Entities: 2
- Enrichments: 2
- Extracted by: pipeline ingest (OpenRouter anthropic/claude-sonnet-4.5)

Pentagon-Agent: Astra <PIPELINE>

domains/space-development/orbital-data-center-thermal-management-is-scale-dependent-engineering-not-physics-constraint.md

@@ -0,0 +1,17 @@
+---
+type: claim
+domain: space-development
+description: "Radiators represent only 10-20% of total mass at commercial scale making thermal management an engineering trade-off rather than a fundamental blocker"
+confidence: experimental
+source: Space Computer Blog, Mach33 Research findings
+created: 2026-04-02
+title: Orbital data center thermal management is a scale-dependent engineering challenge not a hard physics constraint with passive cooling sufficient at CubeSat scale and tractable solutions at megawatt scale
+agent: astra
+scope: structural
+sourcer: Space Computer Blog
+related_claims: ["[[launch cost reduction is the keystone variable that unlocks every downstream space industry at specific price thresholds]]", "[[power is the binding constraint on all space operations because every capability from ISRU to manufacturing to life support is power-limited]]"]
+---
+
+# Orbital data center thermal management is a scale-dependent engineering challenge not a hard physics constraint with passive cooling sufficient at CubeSat scale and tractable solutions at megawatt scale
+
+The Stefan-Boltzmann law governs heat rejection in space with practical rule of thumb being 2.5 m² of radiator per kW of heat. However, Mach33 Research found that at 20-100 kW scale, radiators represent only 10-20% of total mass and approximately 7% of total planform area. This recharacterizes thermal management from a hard physics blocker to an engineering trade-off. At CubeSat scale (≤500 W), passive cooling via body-mounted radiation is already solved and demonstrated by Starcloud-1. At 100 kW–1 GW per satellite scale, engineering solutions like pumped fluid loops, liquid droplet radiators (7x mass efficiency vs solid panels at 450 W/kg), and Sophia Space TILE (92% power-to-compute efficiency) are tractable. Solar arrays, not thermal systems, become the dominant footprint driver at megawatt scale. The article explicitly concludes that 'thermal management is solvable at current physics understanding; launch economics may be the actual scaling bottleneck between now and 2030.'

entities/space-development/google-project-suncatcher.md

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+---
+type: entity
+entity_type: research_program
+name: Google Project Suncatcher
+parent_org: Google
+domain: space-development
+focus: orbital compute constellation
+status: active
+---
+
+# Google Project Suncatcher
+
+**Parent Organization:** Google
+**Focus:** Orbital compute constellation with TPU satellites
+
+## Overview
+
+Google's Project Suncatcher is developing an orbital compute constellation architecture using radiation-tested TPU processors.
+
+## Technical Architecture
+
+- 81 TPU satellites
+- Linked by free-space optical communications
+- Radiation-tested Trillium TPU processors
+- Constellation-scale distributed compute approach
+
+## Timeline
+
+- **2026-03-01** — Project referenced in Space Computer Blog orbital cooling analysis

entities/space-development/sophia-space.md

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+---
+type: entity
+entity_type: company
+name: Sophia Space
+domain: space-development
+focus: orbital compute thermal management
+status: active
+---
+
+# Sophia Space
+
+**Focus:** Orbital compute thermal management solutions
+
+## Overview
+
+Sophia Space develops thermal management technology for orbital data centers, including the TILE system.
+
+## Products
+
+**TILE System:**
+- Flat 1-meter-square modules
+- Integrated passive heat spreaders
+- 92% power-to-compute efficiency
+- Designed for orbital data center applications
+
+## Timeline
+
+- **2026-03-01** — TILE system referenced in Space Computer Blog analysis as emerging approach to orbital thermal management