HelioSwarm is a planned NASA mission to study the Sun.
It is a Medium-Class Explorers mission of the Explorers Program, planned to be launched in 2028.
It will consist of nine satellites ("one hub spacecraft and eight co-orbiting small satellites"), that will measure solar wind turbulence - fluctuations in the magnetic field and motions of the solar wind.
The mission PI is Harlan Spence from the University of New Hampshire.
[1][2] This article related to the National Aeronautics and Space Administration is a stub.