Space Weather Could Distort Interstellar Signals, Complicating SETI Searches

To the point

Co-author Grayce C. Brown explains that space weather around other stars—like solar winds and coronal mass ejections—could broaden and scatter ultra-narrow alien signals across multiple frequencies, making them harder to detect from Earth, especially for planets around low-mass M-dwarf stars, and understanding this helps tailor SETI searches, which now extend to extragalactic surveys with the Murchison Widefield Array and work in the TRAPPIST-1 system.