Henrietta Leavitt was born in Cambridge ... This group studied photo images of stars to determine their magnitude. During her career, Leavitt discovered more than 2,400 variable stars, about ...

Henrietta Leavitt joined the Harvard ... She worked there for the rest of her life. Leavitt discovered 2,400 variable stars, about half of the known total in her day. Through these discoveries ...

When Henrietta Leavitt begins work at the Harvard Observatory ... Instead, she joins a group of women “computers,” charting the stars for a renowned astronomer who calculates projects in ...