Aeon 1
Aeon 1 was Relativity Space's flight-qualified LOX/methane gas-generator-cycle rocket engine for the retired Terran 1 pathfinder. Relativity's 2025 program update reports 10,900 seconds of hot-fire testing and completed flight qualification for Aeon 1; its Terran 1 reference records the vehicle's March 2023 flight and retirement. This retired model remains distinct from the larger Aeon R family that builds on its architecture.
Identity
- Domains
- spaceflight
- Identity Level
- model
- Kind
- liquid-rocket-engine
- Name
- Aeon 1
- Status
- retired
Details
- Description
- Aeon 1 was Relativity Space's flight-qualified LOX/methane gas-generator-cycle rocket engine for the retired Terran 1 pathfinder. Relativity's 2025 program update reports 10,900 seconds of hot-fire testing and completed flight qualification for Aeon 1; its Terran 1 reference records the vehicle's March 2023 flight and retirement. This retired model remains distinct from the larger Aeon R family that builds on its architecture.
- Developers
- Family
- Manufacturers
- Propellants
- liquid methaneliquid oxygen
- Rocket Specs
- Cycle
- gas-generator
Links
- Official Url
- https://www.relativityspace.com/terran-1
Assets & Meta
- Creation Time
- July 29, 2026 at 08:03:21 UTC
- Updated Time
- August 21, 2026 at 16:46:28 UTC
Other
- Sources
- Accessed Date
- 2026-08-21
- Note
- Relativity's current Terran 1 reference identifies the vehicle as a retired March 2023 pathfinder and records its LOX-methane propulsion and gas-generator-cycle engineering heritage.
- Publisher
- Relativity Space
- Title
- Terran 1
- Accessed Date
- 2026-08-21
- Note
- Relativity's 2025 Terran R update reports 10,900 seconds of hot-fire testing during the Terran 1 program and says Aeon 1 completed flight qualification.
- Publisher
- Relativity Space
- Title
- Relativity Space Achieves Major Design and Production Milestones for Terran R, Demonstrating Momentum Towards Launch
- Accessed Date
- 2026-08-21
- Note
- Relativity describes Aeon R as building on the development heritage of the smaller Aeon 1 engine, supporting this model's lineage context.
- Publisher
- Relativity Space
- Title
- Updated Terran R and Aeon R architecture