最近，一些研究人员声称发现了这样的流浪行星。
Recently, some researchers even claimed to have detected such rogue planets.
流浪行星在星系中游走这个概念并没有它听起来那么难以捉摸，与其他星球或流星的引力之战很有可能使该星球脱离太阳系。
The idea of rogue planets wandering the galaxy is not as far-fetched as it may sound. Gravitational tugs-of-war with other planets or passing stars can boot a planet out of its solar system.
海德堡大学的天文学家Joachim Wambsganss并没有参与研究，但是他说，证明新行星确实都是“流浪星”的研究之路任重而道远。
University of Heidelberg astronomer Joachim Wambsganss, who was not involved in the research, said more studies will be needed to confirm that the new planets are indeed drifters.
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