Use the information from the article to answer the question.PlutoWhy is Pluto now called a dwarf planet?

Answer:

In 2003, astronomers discovered a new object beyond Pluto that they named Eris. That discovery caused astronomers to talk about the defining characteristics of a planet. They decided that because of its size and location, Pluto, along with Eris, were not planets. Pluto, Eris, and objects like them are now classified as dwarf planets.