20 years ago, the discovery of Eris changed everything

Eight billion miles (14 billion kilometers) from Earth, at the solar system’s ragged edge, lies Eris — a planet-sized oddball of a world that emerged unexpectedly from the darkness 20 years ago. Named for the capricious Greek goddess of discord, trouble-stirring Eris would doubtless be pleased that her celestial namesake caused even mild-mannered astronomers toContinue reading "20 years ago, the discovery of Eris changed everything" The post 20 years ago, the discovery of Eris changed everything appeared first on Astronomy Magazine.