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astra: extract claims from 2026-03-27-singularityhub-project-ignition-20b-moonbase-nuclear 
- Source: inbox/queue/2026-03-27-singularityhub-project-ignition-20b-moonbase-nuclear.md
- Domain: space-development
- Claims: 2, Entities: 3
- Enrichments: 2
- Extracted by: pipeline ingest (OpenRouter anthropic/claude-sonnet-4.5)

Pentagon-Agent: Astra <PIPELINE>
2026-04-12 06:19:52 +00:00

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type entity_type name parent_org domain secondary_domains status announced launch_date
entity protocol SR-1 Freedom NASA space-development
energy
active 2026-03-24 2028-12

SR-1 Freedom

Type: Nuclear Electric Propulsion (NEP) spacecraft
Mission: Mars transit demonstration
Launch: December 2028
Status: Active development

Overview

SR-1 Freedom is NASA's first nuclear-powered interplanetary spacecraft, announced March 24, 2026 alongside Project Ignition. It repurposes Gateway's Power and Propulsion Element (PPE) as the propulsion system for a nuclear electric spacecraft.

Technical Architecture

Propulsion: Nuclear Electric Propulsion (NEP)

  • Ion thrusters powered by fission reactor
  • Distinct from Nuclear Thermal Propulsion (NTP)
  • Uses Gateway PPE (already built) as propulsion module

Mission Profile:

  • Launch: December 2028
  • Destination: Mars transit demonstration
  • Objective: Validate NEP for deep-space operations

Strategic Context

SR-1 Freedom represents NASA's pivot to nuclear propulsion for interplanetary missions. The repurposing of Gateway's PPE (following Gateway's cancellation) demonstrates adaptive reuse of existing hardware to accelerate nuclear propulsion development.

NEP vs NTP distinction: Nuclear Electric Propulsion (ion thrusters + reactor) provides high specific impulse but low thrust, suitable for cargo missions. This is architecturally different from Nuclear Thermal Propulsion (heated propellant) which provides higher thrust for crewed missions.

Timeline

  • 2026-03-24 — SR-1 Freedom announced; Gateway PPE repurposed as propulsion module
  • 2028-12 — Scheduled launch to Mars

Related Programs

  • project-ignition — Lunar surface program announced simultaneously
  • gateway — Cancelled program whose PPE module was repurposed

Sources

  • Singularity Hub: "NASA Unveils $20B Moon Base Plan and Nuclear Spacecraft for Mars" (March 27, 2026)
  • NASA.gov: "NASA Unveils Initiatives to Achieve America's National Space Policy" (March 24, 2026)