It’s bigger than Pluto, and for a small part of its 560 year orbit around the Sun is actually closer to us than Pluto is. It has pretty much as much right to be called a planet. It was just discovered 70 years later, that’s all. One consequence of the discovery was that Pluto was officially demoted to be merely a “dwarf planet,” along with the new object (and with the large asteroid Ceres).
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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