NASA Artemis: Tunisian Dr Mehdi Benna Directs NASA’s First Lunar Buoy

From Earth’s thermosphere and comets to Mars, Mercury, and the Moon, the mark of Tunisian planetary scientist Dr Mehdi Benna spans the solar system. Serving as Principal Investigator, Dr Benna leads the Lunar Environment Monitoring Station (LEMS-A3) project. In August 2026, the US space agency, NASA, announced the completion of the instrument’s development and testing, confirming its readiness for deployment as part of an Artemis lunar exploration program mission.

Nabeul to NASA: The Early Years

Mehdi Benna’s passion for space began in his childhood. In his NASA profile, he recalled how clear summer nights away from city lights nurtured his interest in space, before joining an astronomy club in his hometown of Nabeul, in north-eastern Tunisia, turning his boyhood gaze towards the night sky into an academic and professional career path that ultimately led him into space sciences.

Benna began his academic journey in electrical engineering, earning an engineering degree in 1999 from the National Engineering School of Tunis (ENIT). He went on to obtain a master’s degree in radio wave communications from the University of Tunis in 2000, before earning a PhD in planetary science from Toulouse University in France in 2002.

His academic and doctoral supervisors exerted a profound influence on his career trajectory, encouraging him to specialise in space sciences. They helped him apply his technical skills to complex scientific questions and instilled an understanding of space research as an endeavour serving humanity.

Following a research tenure in France, Benna joined NASA’s Goddard Space Flight Center in 2003, becoming a senior planetary scientist at the center’s Planetary Environments Laboratory in 2006. His research focuses on plasma physics and planetary magnetospheric dynamics, as well as the development of scientific instruments for space missions.

Benna explained that a planetary scientist is a specialist who studies planets and small bodies in the solar system, including their formation, composition, and diverse environments.

LEMS: A “Scientific Buoy” Listening to the Moon

Having begun his journey looking up at the skies of Tunisia, Benna today stands behind a device engineered to monitor subtle vibrations on the lunar surface and process them into data. As Principal Investigator, he leads the development of the Lunar Environment Monitoring Station (LEMS), an initiative he and his team began in 2018. The project enables Benna to apply his expertise in planetary environments directly to lunar exploration.

Benna described LEMS as a “scientific buoy for the Moon”: much like marine buoys collect continuous oceanic data, LEMS is designed to collect long-term environmental data from the Moon, helping scientists analyse lunar seismic activity and internal structure.

Beyond the Moon: Solar System Missions

Beyond LEMS, Benna is involved in several other projects studying space environments. These include the DISSIPATION project to study Earth’s thermosphere, the MoSAIC project to measure ionospheric and thermospheric properties, and the SEAL project to study the interaction between lander exhaust and lunar soil and volatiles.

Benna utilised his engineering expertise to lead and support the development of precision instruments for space missions spanning Mars, the Moon, Mercury, and comets. He left his mark on the MAVEN mission, dedicated to studying the evolution of Mars’ atmosphere and volatiles. His contributions extended to the Lunar Atmosphere and Dust Environment Explorer (LADEE), the pioneering MESSENGER mission to Mercury, and the European Space Agency’s Rosetta mission, which targeted comets.

A milestone in his career was his participation in the Mars Science Laboratory (MSL) as part of the Sample Analysis at Mars (SAM) instrument team aboard the Curiosity rover. The arrival of the instrument’s first data back on Earth remains one of his career highlights, coming after years of designing, building, and dispatching the instrument to Mars.

A Legacy of Planetary Research

Alongside his work in instrument development and space missions, Benna boasts an extensive research portfolio in planetary science. He has authored or co-authored more than 100 peer-reviewed scientific papers and contributed to over 200 presentations and invited lectures at specialised international planetary science conferences.

His publications address topics including numerical modelling of magnetospheres and exoplanetary atmospheres, small bodies and comets, radio wave propagation, remote sensing, electrical system design and calibration, scientific computing, modelling, and inverse problems.

Award-Winning NASA Career

Throughout his career, Benna has received numerous accolades, including the NASA Exceptional Engineering Achievement Medal in 2014 and the NASA Exceptional Scientific Achievement Medal in 2016 for his research into the Martian environment on the MAVEN mission. In 2025, he received the Goddard Center Director’s Achievement Award, alongside the University of Maryland, Baltimore County (UMBC) Research Faculty Excellence Award in 2026.

Outside his scientific career, Benna is an avid aviation enthusiast who enjoys flying in his spare time; as a commercial pilot, he rarely misses an opportunity to take off and take to the skies.

Behind his distinguished record in complex space achievements, Benna holds an inspiring yet simple philosophy that he shares with future generations. In a statement published on NASA’s website, Benna summarised the secret of success for those aspiring to follow in his footsteps using his “Three Ps”: Be Passionate, Patient, and Perseverant.

For students aiming to venture into science, technology, engineering, and mathematics (STEM), he offered advice to demystify complex equations: “Always remember that behind complex mathematical tools usually lies a simple and elegant scientific explanation.”