Revolutionizing Satellite Efficiency

Space engineers are tackling one of the most persistent challenges in aerospace design: optimizing space on small satellites. A significant hurdle has always been the requirement for separate, bulky fuel supplies to power chemical and electrical thrusters. However, recent research from the Massachusetts Institute of Technology (MIT) suggests a paradigm shift: a single propellant capable of powering both systems simultaneously.


This innovation promises to provide the agility of chemical propulsion and the long-term efficiency of electric thrusters in one compact unit. «If you can have chemical and electrical propulsion in one small package, it's the best of both worlds», stated Amelia Bruno, who led the research at MIT. «This opens the door for small satellites to do even more science, more observations, and more interesting missions, all on a smaller and cheaper platform.»


The ASCENT Advantage

The system utilizes a unique fuel known as ASCENT (Advanced Spacecraft Energetic Non-Toxic Propellant). Unlike the highly efficient but notoriously dangerous hydrazine, ASCENT is designed to be significantly less toxic and easier to handle. Originally developed by the U.S. Air Force, the fuel was previously used during NASA’s Green Propellant Infusion Mission.


The dual-mode potential of ASCENT is the core of the breakthrough. The fuel is compatible with two distinct methods of space movement:

  • Chemical Propulsion: Ideal for rapid, high-intensity maneuvers such as orbital insertion.
  • Electrospray Thrusters: Designed for micro-adjustments and long-term trajectory maintenance using electric fields to accelerate liquid particles.

Testing in the Final Frontier

To validate the laboratory findings, NASA is preparing to launch a cubesat mission featuring this dual-mode propulsion system. This mission, scheduled for no earlier than November, will operate in low Earth orbit to demonstrate that the fuel functions reliably in the vacuum of space.


The implications of this technology extend far beyond small-scale testing. As NASA looks toward future deep-space exploration, including potential human missions to Mars, the ability to pack versatile propulsion into smaller platforms becomes critical. Closer to Earth, this technology could enhance the capabilities of satellite constellations tasked with rapid observation of time-sensitive events like weather patterns.


«You could choose to send them quickly, or slowly, depending on the nature of the observation», explained Paulo Lozano, director of MIT's space propulsion laboratory. «And the only way to do that is if you have two propulsion systems, which is now possible.»