They found the star to be surrounded by a so-called circumstellar disk measuring some 130 astronomical units (12 billion miles) across.

他们发现围绕星体的碟状物质直径大约130天文单位(120亿英里)。

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But the larger envelope of circumstellar dust extends some 60 billion kilometers into space, equivalent to about 400 times the Earth-Sun distance.

但是拱星四周星尘更大的外壳可以向宇宙延伸600多亿公里，相当于地球到太阳距离的400倍。

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They "clearly show that at least some massive stars grow by accreting material from a circumstellar disk of gas and dust, just like our sun did roughly 4.5 billion years ago."

它们‘清楚地显示了至少一些巨型恒星由环绕的碟状气体和尘埃凝聚而成，就如我们的太阳在45亿年前一样。’

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Gravitational interactions between the planets and the remains of the circumstellar disc are thought to play a role.

ECONOMIST: Astronomers may have stumbled on the birth of a solar system