A hole in the dust disk surrounding our solar system would tell alien observers there are planets here, a new simulation shows.

一项最新的模拟实验表明，围绕太阳系的尘埃盘中存在一个空洞，利用这个空洞可以向外星观察者发出信号，告诉它们这里有行星存在。

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U.N.spokesman Weiss,here in Colombo, says independent observers are not permitted into the area.

VOA: standard.2009.05.11

Despite a growing tide of "evidence" (a term used with a hearty grain of salt here), not all tech observers are convinced.

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Dr. THOMMES: And this fact that we are a later generation is probably also good news for our existence here, because what observers have been finding is that it is the more metal-rich stars that are seem to be more likely to have planets orbiting them.

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Here in New York, hundreds of analysts, journalists and industry observers are bustling around the blue-tinted environs of Pier 36 in the Lower East Side for the launch which starts at 10am EST (7am Pacific).

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