We know today that our universe is huge and that it contains more than a hundred billion galaxies! But this view of the universe is only a hundred years old. What is fascinating is that a particular type of star, called Cepheids, is primarily responsible for the change of our view. In this episode of Kainaati Gup Shup, astrophysicist Salman Hameed discuss why Cepheids played such a central role in this episode of Kainaati Gup Shup.