Every evening, from the time she was a child, Maria Mitchell stood on her rooftop with her telescope and swept the sky. And then one night she saw something unusual--a comet no one had ever seen before! Miss Mitchell's extraordinary discovery made her famous the world over and paved the way for her to become America's first professional female astronomer.

Gorgeously illustrated by Diana Sudyka, this moving picture book about a girl from humble beginnings who became a star in the field of astronomy is sure to inspire budding scientists everywhere.