Scientists could look for such hallmarks of alien technology on Earth and the moon, in near space, on Mars and among the asteroids.

科学家可以在地球和月球以及周围区域寻找地外技术的标志。

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The mechanical analysis and the trimming were performed for a novel near space aircraft which uses the variation in wind speed at high altitude to control its flight path.

对一种利用高空风的风速差控制飞行轨迹的新型低能耗临近空间飞行器，进行了力学分析与配平计算。

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Sedimentary rocks—the most common rock type near the surface—are also the most common reservoirs for water because they contain the most space that can be filled with water.

沉积岩——地表附近最常见的岩石类型——也是最常见的储水层，因为它们可以装水的空间最多。

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Near the space center in Houston,Texas, some amateur star-watchers were trying to see the Apollo spacecraft through telescopes.

VOA: special.2009.07.22

It would provide information on the controls needed in the near weightless environment of lower space.

VOA: special.2010.07.07

Near the end of June, the shuttle Atlantis will return to space.

VOA: special.2011.03.29

Cameras were also included in the payload to capture photographs and video footage of Northern Ireland from thousands of metres up near space.

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The engine constantly throttles up and down, not only to counter the drag on the satellite from residual air molecules in near space but also to smooth the flight of the vehicle to minimise the noise in the gravity measurements.

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"Together, we proved that a human in freefall can break the speed of sound returning from near space, going through a transonic phase and landing safely on the ground, " said Dr Jonathan Clark, a former space shuttle flight surgeon and the Red Bull Stratos medical director.

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