Within our own galaxy there are probably tens of thousands of planetary systems.

在我们所在的银河系中，很可能存在数以万计的行星系。

《柯林斯英汉双解大词典》

Those who study other planetary systems have been more restrained.

研究其它行星系的天文家则比较拘谨。

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The researchers speculate that it could be a side-effect of the mechanism by which planetary systems form.

研究者推测，这可能是形成行星体系机制的副作用。

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Firstly, says Robert Noyes of the Harvard-Smithsonian team, it suggests that further planetary systems await detection.

ECONOMIST: Planet hunting

Astronomers said Thursday the two planets could provide clues to how planetary systems are formed, and aid the search for extraterrestrial life.

CNN: Astronomers spy new neighbors outside solar system

While this new model could explain Earth's relative lack of water, it shouldn't be extended to all newly forming planetary systems, researchers said.

MSN: Earth's hot formation may be reason behind water shortage