How Did The Planet Earth Form? | European Southern Observatory FriendsofNASA.org: How did our Earth come to be? What conditions make it a hospitable world? Could similar habitable planets exist around other stars? In this episode of Chasing Starlight, European Southern Observatory (ESO) astronomer Suzanna Randall gives us the secret recipe to bake an Earth, and shows us how ESO telescopes are revealing what is cooking around other stars. 1:03 Ingredients and how to combine them 3:51 Bake until c