Henrietta Leavitt…Eternal Contribution…4 July

13557752_10157121367210164_3358864559573275863_n4th July,  Besides being the USA’s birthday, it’s also the birthday of Henrietta Leavitt. In 1912, Leavitt discovered a simple and robust relationship between the luminosity and pulsation period of a certain kind of massive star. Edwin Hubble used Leavitt’s work to discover the expansion of the universe in 1929—eight years after Leavitt died of cancer at the age of 53….Physics Today

Eternal Salute to a great women and one of the foremost scientist of her era.