A stellar mind leaves this planet
My wife and I met Hans Bethe briefly about 12 years ago, at a two-day symposium at Cornell University celebrating Carl Sagan's 60th birthday. We were both struck by just what a sweet, quiet delightful and unassuming man he was -- a real mensch, as they say. I was greatly saddened to hear of his passing today at the age of 98. A nice obit from the New York Times is here.
Among other things, Bethe was one of the key people in figuring out the nuclear processes that power the stars.