How do the physical characteristics of Pluto and Eris differ regarding size and mass?
Answer
Pluto has a larger diameter, but Eris is more massive.
While both bodies are comparable in size, modern measurements distinguish them by these two metrics. Pluto holds the title for the largest diameter among the known Trans-Neptunian objects. Conversely, Eris is denser, which results in it being the more massive object of the pair.
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