How did scientist learn about Eris?

Answer 1

Scientists discovered Eris in January 2005 using the Palomar Observatory's Samuel Oschin Telescope. Initially identified as a potential planet, its size and mass were later confirmed through further observations, revealing it to be slightly smaller than Pluto but more massive. The discovery of Eris significantly contributed to the debate over the classification of celestial bodies in our solar system, ultimately leading to the redefinition of what constitutes a planet. Its unique characteristics and distance from the Sun have made it a subject of ongoing research in astronomy.