The Sun–Earth–Solar System Plasma Circuit: Heliospheric Field Geometry, Planetary Coupling, and the Architecture of Electromagnetic Transport

The solar system is commonly modeled as a gravitationally bound collection of bodies embedded in near-vacuum. However, in situ measurements from spacecraft, ground-based magnetometers, and radio propagation studies demonstrate that the heliosphere, planetary magnetospheres, and ionospheres form a continuous, electrically active plasma network. This paper presents a unified framework in which the Sun, heliosphere, and planets operate as components of a large-scale electromagnetic circuit. The Sun functions as a plasma current source, the heliosphere as a resonant cavity, and planetary magnetospheres and ionospheres as coupled field nodes. Earth’s magnetosphere–ionosphere–ocean system is shown to form a closed conductive loop that couples solar energy into atmospheric and geophysical dynamics. This architecture provides a physical basis for field-aligned energy transport, plasma duct formation, and the existence of coherent electromagnetic corridors within the solar system. solar plasma circuit, heliospheric current sheet, ionosphere magnetosphere coupling, Birkeland currents, field-aligned currents, plasma waveguides, ionospheric ducts, magnetospheric flux tubes, heliosphere plasma cavity, solar wind coupling, auroral electrodynamics, space plasma transport, electromagnetic field geometry, plasma resonators, ionosphere ocean coupling, telluric currents, planetary plasma ecology, magnetohydrodynamics, plasma cavities, space weather coupling, plasma-structured space, non-collisional energy transport, electromagnetic corridors, solar-terrestrial coupling, heliophysics, space plasma physics, geomagnetic coupling, ionospheric conductivity, plasma wave propagation, magnetosphere plasma dynamics