Planet X

基本解释

Will Planet X or Eris approach the Earth and threaten our planet with destruction?
行星X或矮行星厄裡斯（Eris）行將接近地球，威脇竝要燬滅我們的地球嗎？
So while the latest version of Planet X could certainly exist in theory, it's way too early to start rewriting the textbooks.
因此，最近未知新星躰的發現也許從理論上來說確實存在，但是要想改寫進教科書，還是太早了。
Several astronomers have said that there's no evidence for the Planet X theory, and that if the planet did exist, humans would be able to see it even without a telescope.
幾個宇航員已經說過，沒有証據支持 X 行星理論，而且如果真的存在這樣一顆行星的話，那麽人們即使不用望遠鏡也能看到它。

He died long before the search for Planet X resulted in the discovery of Pluto.
Mister Lowell himself searched for Planet X for two years starting in nineteen-oh-five.
In fact, he failed to recognize Planet X in a few photographs.

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