The prototype ion engine tested by ESA can create fuel out of this air, allowing satellites to stay in orbit indefinitely.
Source: Air-fueled ion thruster could provide unlimited power for space missions
The ESA states that “air-breathing electric propulsion” is no longer a theory.
The prototype ion engine tested by ESA can create fuel out of this air, allowing satellites to stay in orbit indefinitely.
Source: Air-fueled ion thruster could provide unlimited power for space missions