Charles Hirshberg's mother is known for uncovering a method for predicting what?
Charles Hirshberg:  His mother is the astrophysicist Joan Feynman and his uncle was Nobel Prize-winning physicist Richard Feynman. Joan Feynman:  She is also known for creating a model that predicts the number of high-energy particles likely to hit a spacecraft over its lifetime, and for uncovering a method for predicting sunspot cycles.
sunspot cycles