. . "Biography" . "An illustrated portrait of astronomer Henrietta Swan Leavitt traces the years she spent measuring stars from her position at the Harvard College Observatory and her important discoveries that enabled the scientific community to gain a fuller understanding of the universe's vast size." . . "Juvenile works" . . . . . "Picture books" . . . . "Look Up!: : Henrietta Leavitt, pioneering woman astronomer" . "Picture books for children" . . .