From David Copsey
Hiroyuki Maehera says 148 solar flares capable of eviscerating the atmosphere of a habitable planet have been observed among 83,000 “sun-like” stars over 120 days (21 May, p 31). That suggests such a star should, on average, experience one such flare every 184 years. Either we are very lucky, or our sun is different from the sample – and if so, how?
Brighton, East Sussex, UK
