Description In 1992, Dr. Mae Jemison made history by spending eight days in Earth's orbit, making her the first black woman ever to visit space. Twenty years later, Dr. Jemison is pushing space travel forward again with her 100 Year Starship Foundation. In this new True Book series, readers will join Dr. Jemison as she guides them on a tour of our solar system and explains how astronomers have used technology to discover new stars and planets.