Cosmic rays of various kinds come through the air from outer space, but enormous quantities of radiation from the sun are screened off.

来自外太空的各种宇宙射线通过空气进入大气层，但来自太阳的大量辐射却被屏蔽了。

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According to Alan Stern, planetary scientist, the biggest public relations boost for the ISS may come from the privately funded space flight industry.

行星科学家艾伦·斯特恩认为，国际空间站最大的公关推动力可能来自私人资助的太空飞行业。

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Where then, did our nearest neighbor in space come from, and what will the future bring? To answer these questions we must go very far back into time.

那么，我们这个最近的邻居来自何方，未来又将怎样？为了回答这些问题，我们必须回到遥远的过去。

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"So we are really talking about drastic reductions, and they must come from countries which have overused their share of the global atmospheric space, which have a natural debt that must be paid, and I think if countries like India are asking for that, it is not wrong.

VOA: standard.2009.11.27

Particles (known as meteoroids) that come from interplanetary space, on the other hand, are natural.

ECONOMIST: Orbital debris

Many forecasters, though, think that most of the near-term growth in space launches will come from another source: space tourism.

ECONOMIST: SpaceShipOne

In an amusing Super Bowl ad that debuts on TV on Sunday, the Kia brand explains where babies come from (outer space).

FORBES: Kia Super Bowl Ads For Sorento, Forte Models Use Space Babies and Hot Bots