4: The Cradle of Stardust (Season 1 Premiere)

Season 1 Premiere We finally start the tale of Earth’s history from the beginning, in the cold depths of outer space. The Sun is born and the first asteroids assemble. When these asteroids crash into Earth today, they provide time capsules from the beginning of the solar system. Extra credit: look for the Orion Nebula in the night sky, or go meteorite hunting with a friend.