Sample Response: 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. Which did you include in your answer? Check all that apply.In 2003, astronomers discovered Eris.The discovery of Eris caused astronomers to talk ab
A
In 2003, astronomers discovered Eris.B
The discovery of Eris caused astronomers to talk about the defining characteristics of a planet.C
Because Pluto has not cleared its orbit, it is not considered to be a planet.D
Pluto, Eris, and other objects like them are now classified as dwarf planets.