Search Results: Returned 1 Results, Displaying Titles 1 - 1
-
-
-
c2013., Juvenile, Simon & Schuster Books for Young Readers Call No: B Edition: 1st ed. Availability:1 of 1 At Location(s) Summary Note: Henrietta Swan Leavitt changed the course of astronomy when she was just twenty-five years old. Henrietta spent years measuring photographs of stars. Her discovery that certain stars had a fixed pattern to their changes in brightness made it possible for astronomers to measure greater stellar distances, leading to our present understanding of the size of the universe.
