Ever since Williamina Fleming was little she was curious, and her childhood fascination with light inspired her life’s work. Mina became an astronomer in a time when women were discouraged from even looking through telescopes. Yet Mina believed that the universe, with its billions of stars, was a riddle - and she wanted to help solve it. Mina ultimately helped to create a map of the universe that paved the way for astronomers. Newbery Honor–winning Kathryn Lasky shares her incredible true story.