Sketch of the magnetospheric interaction in the TRAPPIST-1–TRAPPIST-1e system. The stellar wind velocity and IMF streamlines are drawn in green and white, respectively. The M-dwarf star is shown as a yellow sphere, and the planet TRAPPIST-1e as a blue shaded circle. The planetary magnetic field lines (white) exhibit compression on the dayside and extension into a magnetotail. A bow shock structure forms upstream of the planet under a super-Alfvénic regime. The colour scale represents normalised plasma density.