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Background: 日本宇航员称他们发现了众多没有环绕恒星运行的“行星”。刊登在《自然》杂志中的文章介绍说,科学家们发现了10颗与木星大小相同的,并处于太阳系之外的行星。

The researchers claim to have found 10 dark gas giants floating at the heart of our Milky Way without any nearby star to illuminate them. Astronomers have long suspected such rogue planets existed, but this is the first evidence, and the Japanese team believe there could be as many out there as there are stars, a finding likely to shock many.

How they came into being is unclear. One theory is that they may be cast-outs, forgotten worlds ejected from infant solar systems by gravitational forces or interplanetary collisions.www.Examw.com

Strictly speaking, the objects aren't even planets, as by definition planets orbit a star or the remains of one. But should the researchers have their calculations right, then strange dark orbs which look very much like planets are out there, far far from any shining star.


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