The Sun is our closest star. Billions of years ago, it shaped the formation of our home planet and the beginning of life on Earth. Today, it provides the heat and energy that powers our civilization, but it can also disrupt our technology and spacecraft through explosive outbursts of radiation. Join NASA Sun scientist Joe Westlake on a journey from the surface of Earth to the Sun’s core to learn how intricately we’re connected to our star and the progress we’ve made unraveling its mysteries. This is episode one of the Sun and Eclipse series from NASA's Curious Universe, an official NASA podcast.