Proxima b, TRAPPIST-1e, Ross-128b and LHS-1140b — the closest potentially habitable exoplanets — orbit a different kind of star than our Sun: M-type stars (red dwarfs). Such stars can flare frequently, bombarding the planets with biologically damaging ultraviolet (UV) radiation, placing their atmospheres at risk of erosion and bringing the habitability of these worlds into question. A new study, however, finds that UV radiation should...
