Cepheids and Measuring Distance in space

Explore the fascinating world of variable stars, focusing on Cepheid variables and their importance in astronomy. Learn about Henrietta Swan Leavitt's groundbreaking Period-Luminosity relation, which revolutionized distance measurement in space. Delve into methods for calculating cosmic distances, including applications in the Andromeda Galaxy. Discover the cutting-edge tools and technology, such as virtual observatories and the Aladin Sky Atlas, that aid astronomers in these measurements.