On October 8, 1873, Ejnar Hertzsprung was born in Copenhagen, Denmark. Herzsprung calculated the distance of several nearby Cepheid variables. Since Cepheid variables have such a consistent luminosity, they can be used to determine the distant of objects where they reside. In 1913, Herzprung used this technique to estimate the distance to the Small Magellanic Cloud, a dwarf galaxy that orbits the Milky Way galaxy. He is well know for his part in developing the Hertzsprung–Russell Diagram which classifies stars by age and luminosity.
World Space Week runs from October 4 – 10, 2017.
Check back tomorrow for another great World Space Week Space Fact.