Aeon 1 engine family
Aeon 1 is Relativity Space's retired family of LOX/methane gas-generator-cycle rocket engines developed for the Terran 1 pathfinder. The family groups the flight-qualified Aeon 1 model and the Aeon Vacuum variant and remains distinct from the Terran 1 vehicle; the larger Aeon R model's documented development heritage traces back to the smaller Aeon 1 engine.
Identity
- Domains
- spaceflight
- Identity Level
- family
- Kind
- liquid-rocket-engine
- Name
- Aeon 1 engine family
- Status
- retired
Details
- Description
- Aeon 1 is Relativity Space's retired family of LOX/methane gas-generator-cycle rocket engines developed for the Terran 1 pathfinder. The family groups the flight-qualified Aeon 1 model and the Aeon Vacuum variant and remains distinct from the Terran 1 vehicle; the larger Aeon R model's documented development heritage traces back to the smaller Aeon 1 engine.
- Developers
- Manufacturers
- Propellants
- liquid methaneliquid oxygen
Links
- Official Url
- https://www.relativityspace.com/terran-1
Assets & Meta
- Creation Time
- July 29, 2026 at 08:05:05 UTC
- Updated Time
- August 21, 2026 at 16:47:41 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 completed Aeon 1 flight qualification and describes the Terran 1 program's 10,900 seconds of hot-fire testing.
- 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 identifies Aeon R as building on the smaller Aeon 1's development heritage, providing the family-level predecessor context.
- Publisher
- Relativity Space
- Title
- Updated Terran R and Aeon R architecture