A New Design For A Plasma Engine Fuels On Only Thin Air

Choosing what orbit to put a satellite in always comes with trade-offs. When it comes to Very Low Earth Orbit, between 100-450 km, there are distinct advantages. The science-journalism coverage adds useful context, while the strongest evidential footing still comes from the underlying data, papers or institutional documentation.

It matters because cosmology operates at the edge of what current instruments can measure, where systematic errors and model assumptions are never trivial. Small discrepancies between independent measurements have historically pointed toward missing physics rather than simple calibration errors, and the ongoing tension in the Hubble constant is a live example of how a persistent disagreement between methods can reshape the theoretical landscape. Each new dataset that approaches this territory with independent systematics adds real information to a problem that has resisted easy resolution for more than a decade. When it comes to Very Low Earth Orbit (VLEO), between 100-450 km, there are distinct advantages. So, as part of his PhD thesis at the University of Stuttgart, which is available in arXiv, Francesco Romano decided to solve that problem by using the very air molecules that.

In the upper atmosphere, UV radiation splits O2 into this aggressive, single atomic form of the gas that we all need to breathe. Another difficult feature when designing engines for use in VLEO is the variability of the atmosphere itself.

It collected ~94.3% of the particles of air (which was AO, argon, or nitrogen in a wind tunnel test), and the efficiency only dropped by 8% when subjected to a 15° tilt. Using a birdcage antenna, similar to those used in MRIs, he managed to design a thruster that ensured 99% of the delivered electrical power actually entered the thruster, an.

The engine generated steady streams of plasma with only 50-60W of RF power, well within the capabilities of traditional spacecraft solar panels. But the use cases aren’t limited to Earth.

The relevance goes beyond one dataset because even small shifts in measured parameters can matter when the field is testing the limits of the standard cosmological model. The Lambda-CDM framework describes the observable universe with remarkable economy, but its success rests on two components, dark matter and dark energy, whose physical nature remains entirely unknown. Any credible measurement that tightens or loosens the constraints on those components moves the entire theoretical enterprise forward, regardless of whether the immediate result looks dramatic on its own terms.

Mars has an atmosphere dominated by CO2, and, according to the thesis, the engine could support a spacecraft indefinitely above the Red Planet at a height of 120 - 160 km, which. But the idea is intriguing, and there are plenty of potential commercial applications for it if it can be de-risked and proven to work on an actual mission.

Because this item comes through Universe Today as science journalism, it should be treated as contextual reporting rather than primary evidence. Good science reporting can identify why a result matters, connect it to the wider literature and make technical work readable, but the decisive evidence remains in the original paper, dataset, mission release or technical record. That distinction is especially important when a story is later repeated by aggregators, because repetition increases visibility, not evidential strength.

The next step is to see whether the effect survives when independent surveys, different calibration strategies and tighter control of systematic uncertainties enter the picture. Programmes such as Euclid, DESI and the Rubin Observatory will deliver datasets over the next several years that cover the same parameter space with largely independent methods. If the current signal persists through those tests, its theoretical implications will become impossible to set aside.

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