When Richard was five years old, his mother gave birth to a younger brother, but this brother died at four weeks of age. Four years later, Richard gained a sister, <answer>Joan</answer>, and the family moved to Far Rockaway, Queens. Though separated by nine years, <answer>Joan</answer> and Richard were close, as they both shared a natural curiosity about the world. Their mother thought that women did not have the cranial capacity to comprehend such things. Despite their mother's disapproval of <answer>Joan</answer>'s desire to study astronomy, Richard encouraged his sister to explore the universe. <answer>Joan</answer> eventually became an astrophysicist specializing in interactions between the Earth and the solar wind.
What is Feynman's sister's name?
Joan