Main Answer:
Currently, Eris is thought to be the largest known dwarf planet. Eris, discovered in 2005, is the largest known dwarf planet, challenging previous estimates due to uncertainties in its size.
Therefore, the correct answer is e) Eris.
Step-by-step explanation:
Eris, discovered in 2005, gained prominence as it sparked the reevaluation of the solar system's definition, leading to Pluto's reclassification as a dwarf planet. Eris is considered the most massive dwarf planet, with a diameter slightly smaller than Pluto's. The November 2010 observation, capturing Eris eclipsing a star, raised questions about its size, challenging previous estimates.
This event cast doubt on Eris's actual diameter, emphasizing the challenges of accurately measuring distant celestial bodies. Despite uncertainties in size, Eris retains its status as the most massive dwarf planet, reflecting the evolving nature of astronomical knowledge. This constant reevaluation underscores the importance of ongoing observations and technological advancements in refining our understanding of celestial bodies.
Therefore, the correct answer is e) Eris.