Our Newest Planet: Is it real, and what can it tell us about our solar system?

by Chamith Fonseka figures by Anna Maurer The solar system may soon go back to having nine planets, but don’t rejoice yet, Pluto fans. Ten years ago, Pluto was downgraded to the status of a dwarf planet after a team of astronomers led by Michael Brown of Caltech, Chad Trujillo of the Gemini Observatory, and David Rabinowitz of Yale discovered Eris, an object that was … Continue reading Our Newest Planet: Is it real, and what can it tell us about our solar system?