[PAR] [TLE] Joan Feynman [SEP] Joan Feynman (born March 31, 1927) is an American astrophysicist.  She has made important contributions to the study of solar wind particles and fields; sun-Earth relations; and magnetospheric physics.  In particular, Feynman is known for developing an understanding of the origin of auroras.  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.  Feynman is the younger sister of physicist Richard Feynman. [PAR] [TLE] Charles Hirshberg [SEP] Charles "Chuck" Hirshberg is an American journalist and sportswriter.  He primarily writes for large-circulation magazines.  His articles and columns have appeared in "Time", "Sports Illustrated", "Life", the "Los Angeles Times", the "Washington Post", "Men's Health" and other publications.  As of 2002, he was an editor of "Popular Science".  His mother is the astrophysicist Joan Feynman and his uncle was Nobel Prize-winning physicist Richard Feynman.
[PAR] [TLE] Joan Feynman [ SEP ] Joan Feynman ( born March 31 , 1927 ) is an American astrophysicist . She has made important contributions to the study of solar wind particles and fields ; sun - Earth relations ; and magnetospheric physics . In particular , Feynman is known for developing an understanding of the origin of auroras . 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 . Feynman is the younger sister of physicist Richard Feynman . [PAR] [TLE] Charles Hirshberg [ SEP ] Charles " Chuck " Hirshberg is an American journalist and sportswriter . He primarily writes for large - circulation magazines . His articles and columns have appeared in " Time " , " Sports Illustrated " , " Life " , the " Los Angeles Times " , the " Washington Post " , " Men 's Health " and other publications . As of 2002 , he was an editor of " Popular Science " . His mother is the astrophysicist Joan Feynman and his uncle was Nobel Prize - winning physicist Richard Feynman .
Charles Hirshberg's mother is known for uncovering a method for predicting what?
Charles Hirshberg 's mother is known for uncovering a method for predicting what ?
sunspot cycles
sunspot cycles