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Solar system conspiracy theorists have long harbored suspicions that a hidden extra planet or dwarf star lies beyond the orbit of Pluto.
太陽系陰謀論者一直以來長期庇護這樣一種觀點，那就是在冥王星軌道深處還隱藏著一顆行星或者矮星。
As a planet, it's been called Tyche or simply Planet X.
它曾被當作行星命名為堤喀或者簡單的X行星。
As a star, Nemesis.
或者曾被當作一顆恒星命名為涅墨西斯星。
But an exhaustive search has found no hints of this long-rumored object.
但是一個詳細的調查已經發現這顆長期被傳聞籠罩物體的真實面目。
NASA's Wide-Field Infrared Survey Explorer has scanned the entire sky in infrared light, twice,
NASA的廣譜紅外調查探測設備已經第二次用紅外線掃描出這顆星球的全部大氣層,
and ruled out any hidden bodies larger than Saturn out to 10,000 times the distance from the Earth to the sun.
排除了任何可能比土星大，距離地球到太陽一萬倍的任何隱藏物體。
Furthermore, it found no evidence for anything bigger than Jupiter out to 26,000 times the Earth-sun distance.
此外，還發現沒有比木星更大的，超過日地距離26000倍的任何可能存在物體。
Pluto, for comparison, lies only 40 times farther from the sun than Earth.
而冥王星比地球距太陽的間距只遠40倍。
The finding deals a blow to theories that a Planet X- or Nemesis-type object may have caused periodic mass extinctions on Earth.
這一研究發現對某些理論是個不小的沖擊，比如X行星或涅墨西斯星之類的天體曾造成地球上的物種滅絕。
Some theorists have mused that a hidden planet might have swept through bands of comets in the solar system,
一些理論家已經考慮一顆隱藏的行星也許本該被太陽系存在的一個彗星帶打掃干凈，
sending them crashing into Earth.
而且轉而沖向地球。
Now it seems that for such mass species die-offs,
現在按照如此這般推論看來，
the fault lies not in the stars.
大規模物種滅絕其實的罪魁禍首并不是這些行星。
