That's key to understanding planet formation.

这是理解行星形成的关键。

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The standard theory of planet formation holds that no planet that large could be formed so close to a star, leading to the suggestion that the body is a companion star.

行星形成的标准理论认为，没有一颗如此大的行星能在如此靠近恒星的地方形成，因此才有人推测该天体是一颗伴星。

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This means that the young stars are anemic and planet formation is rare.

这就意味着年轻的恒星是无生气的，行星的形成是稀少的。

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" planets like our own planet formed. So star formation is a very big thing for Herschel."

VOA: standard.2009.05.14

But, in fact, they were also likely responsible for triggering terrestrial planet formation.

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There are two leading theories of planet formation.

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The list of top discoveries made with Hubble reads like the hit parade of astronomy: a mysterious new "dark energy" causing the accelerating expansion of the universe, distances to other galaxies, the supermassive black holes at their centers, the age of the universe, planet formation around other stars, searches for signs of extraterrestrial life -- and the list goes on.

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