Decoding the invisible physics of Earth's magnetic shield

Space · Published 16 October 2026 Swipe more like this →

In short: How can we study the invisible, turbulent forces protecting our planet? Electrical engineer James Fraction is helping NASA use Earth's magnetosphere as a massive laboratory. By deploying four identically instrumented spacecraft, the Magnetospheric Multiscale mission investigates the fundamental plasma processes, such as magnetic reconnection, that shape our complex space environment.

At NASA's Goddard Space Flight Center, electrical engineer James Fraction is contributing to the Magnetospheric Multiscale (MMS) mission. This ambitious project, part of the Solar Terrestrial Probes mission, utilizes a fleet of four spacecraft. Each of these four vessels is equipped with identical instrumentation, allowing for a synchronized study of the complex environment surrounding Earth. This specialized work is being conducted at the Goddard facility located in Maryland. The mission itself is categorized under the broader Solar Terrestrial Probes program.

The mission's primary objective is to use Earth's magnetosphere as a natural laboratory. By observing this region, scientists can investigate the microphysics of three critical plasma processes: magnetic reconnection, turbulence, and the acceleration of energetic particles. Understanding these mechanisms is essential to grasping how energy and matter interact within our planetary magnetic field. Researchers focus on these specific microphysical interactions to better understand the broader solar-terrestrial relationship. These observations are vital for mapping the complex dynamics of the plasma environment.

Beyond the technical complexities of spacecraft instrumentation, NASA uses these profiles to highlight the human element of scientific discovery. During initiatives like African-American History Month, the agency shares the work of engineers like Fraction to provide visibility into the daily realities of engineering careers at Goddard. These efforts aim to connect the next generation of students and educators with the scientists driving our understanding of the solar system. In February 2012, NASA released specific video features to showcase these professionals. These digital profiles were part of a larger effort to engage K-12 students and teachers.

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