A twin star of the Sun, formed billions of years ago as the Solar System took shape, might help explain movements of bodies at the outer reaches of our family of planets, researchers suggest. Astronomers from The Center for Astrophysics believe that if a ninth planet is discovered beyond the orbit of Pluto, its movements could help us better understand how the Sun and our planetary neighborhood formed billions of years in the past.--- Send in a voice message: https://anchor.fm/the-cosmic-companion/messageSupport this podcast: https://anchor.fm/the-cosmic-companion/support Get full access to The Cosmic Companion at thecosmiccompanion.substack.com/subscribe