Aeterna Sidera

Founder-led spacecraft propulsion development

Developing in-space chemical propulsion for spacecraft maneuvering.

Aeterna Sidera Inc. is developing an in-space bipropellant chemical-propulsion program, with an approximately 1 N-class head as the initial direction.

Review the development program Start a conversation

Intended application domain

When maneuver time and acceleration matter.

Electric propulsion excels at efficient cumulative velocity change. Stored-gas systems can support simple, precise impulses. Chemical propulsion is well suited to spacecraft maneuvers where response time and acceleration matter. Aeterna is developing its system for that mission space.

The application cases below guide the program’s requirements and development priorities.

  • Rapid rephasing
  • Conjunction response
  • Rendezvous
  • Orbit correction
  • Disposal
  • Contingency recovery

Development boundary

A coupled subsystem—from propellant source to nozzle exit.

Aeterna is developing the propellant source/feed system and thruster head as a coupled subsystem, with an intended boundary extending through the nozzle exit. Exact components and internal architecture remain open engineering decisions.

  1. 01

    Propellant source and feed

    Defines the delivery conditions and interfaces available to the thruster head

  2. 02

    Approx. 1 N head direction

    Establishes the initial scale for head-end development and integration

  3. 03

    Nozzle exit

    Marks the downstream end of the intended propulsion-subsystem boundary

Conceptual development boundary. The exact architecture and configuration will be established through development.

Evidence-gated progression

Evidence before scale.

Aeterna is currently in the engineering-definition stage, prior to hardware development. The program advances through staged engineering and test evidence.

  1. 01

    Engineering definition

    Current

    Establish the application, subsystem, interface, and verification basis for physical development.

  2. 02

    Head-end development

    Planned

    Develop and test an initial head-end article under controlled ground conditions.

  3. 03

    Integrated subsystem development

    Future

    Integrate the source/feed system and developed head-end in a ground-development configuration.

  4. 04

    Later maturation

    Future

    Extend evidence through relevant operating environments, endurance, qualification, manufacturing, and flight-intent development.

Company and method

Founder-led engineering.

Aeterna Sidera is led by Jesus Huizar, Founder, CEO, and Chief Engineer. He holds a B.S. in Chemical Engineering from UC Berkeley and an M.S. in Aerospace Engineering from UC San Diego. His experience spans spacecraft propulsion, multiphysics modeling, and experimental hardware, including a NASA Jet Propulsion Laboratory internship and university propulsion research.

Technical direction is led by the Founder and Chief Engineer. The development plan includes future specialist participation and independent technical review.

Contact

Start a conversation.

We welcome non-sensitive conversations with spacecraft developers, propulsion and integration practitioners, specialists, facilities, suppliers, and potential partners or investors.

Please do not send classified, export-controlled, proprietary, or procurement-sensitive information.

Email Aeterna Sidera