然而现在科学家称大灭绝的周期性实际上证明涅墨西斯星球理论是错误的，因为随着时间的推移，在和其他星球的相互作用下，星球的运行轨迹会发生改变。
But now scientists claim that the regularity of the mass extinctions actually disproves the Nemesis theory because its orbit would have changed over time as it interacted with other stars.
研究者称：“引发涅墨西斯星球理论的化石资料现在却成了对该理论不利的证据。”
'Fossil data, which motivated the idea of Nemesis, now militate against it,' say the researchers.
20世纪80年代时科学家们认为地球周期性的生物灭绝可能是由遥远太空的涅墨西斯星球造成的，该星球和太阳很相似。
In the 1980s scientists believed that Earth's regular extinctions could be the result of a distant dark twin of the Sun, called Nemesis.
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