An element is a chemical substance made up of a particular kind of atom and hence cannot be broken down or transformed by a chemical reaction into a different element, though it can be transmuted into another element through a nuclear reaction.
Almost 40 years separate Shirley Ann Jackson's achievement, as the first African-American woman to earn a Ph.D. in theoretical high energy physics at Massachusetts Institute of Technology, and Jedidah Isler, the first African-American woman to receive a Ph.D. in Astrophysics from Yale.
Synopsis. Dr. Sally Ride studied at Stanford University before beating out 1,000 other applicants for a spot in NASA's astronaut program. After rigorous training, Ride joined the Challenger shuttle mission on June 18, 1983, and became the first American woman in space. Born on May 26, 1951, Sally Ride grew up in Los Angeles and went to Stanford University, where she was a double major in physics and English.