Discovery of planet too big for its sun throws off solar system formation models

Discovery of planet too big for its sun throws off solar system formation models

NASA’s 6-Pack of Mini-Satellites Ready for Their Moment in the Sun

Dwarf planet Eris is 'squishier' than expected. Eris is about the size of Pluto but around 50% farther from the sun. The discovery of Eris in the Kuiper Belt beyond Neptune in 2005 prompted the debate that ultimately reclassified Pluto as a dwarf planet.