Ever since Williamina Fleming was little, she was curious—always in awe of her father’s photography and how he would catch the light to make an image. Mina’s childhood fascination with light inspired her own life’s work. Mina became an astronomer in a time when women were discouraged from even looking through a telescope. But despite these limitations, Mina believed that the universe, with its billions of stars, was a riddle—and she was going to be the one to help crack it. And she did! Mina helped to create a map of the universe that paved the way for astronomers and has been used for more than a century. This is the inspiring true story of Williamina Stevens Fleming and her lifelong work to decode the secret language of starlight.