From Ross Sargent
Your articles states: “Astrophysics and cosmology would have had to wait for 1950s technology – specifically planes such as the X-15 that could fly at high altitude, above the clouds.” I suggest that this more than a little unfair to pioneers of, say, cosmic ray studies. Victor Hess did experiments in a balloon in 1912, and Robert Millikan’s 1923 Nobel prizewinning work involved a Condor bomber. Not everything would have had to wait for the X-15.
Folkestone, Kent
