Look up!: Henrietta Leavitt, pioneering woman astronomer
Biographies, Sciences et médecine (biographies), Femmes (biographies)
Braille avec transcription humaine
Résumé
Henrietta Leavitt was born in 1868, and she changed the course of astronomy when she was just twenty-five years old. Henrietta spent years measuring star positions and sizes from photographs taken by the telescope at the Harvard College Observatory, where… she worked. After Henrietta observed that certain stars had a fixed pattern to their changes, her discovery made it possible for astronomers to measure greater and greater distances - leading to our present understanding of the vast size of the universe. Grades K-3 and older readers. 2013.