Objects, like bits of old space rockets or satellites, move around the planet at very high speeds, so fast that even a very small piece can break important satellites or become dangerous to astronauts.

一些物体，比如一些旧的太空火箭或卫星碎片，在地球上以非常高的速度运动，速度如此之快，以至于一个非常小的碎片都能破坏重要的卫星或对宇航员造成危险。

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Iridium, usually used in space rockets, is ten times rarer than platinum and highly resistant to heat so theoretically it can be dropped it into lava, and it will not melt.

铱，通常被用于太空火箭，比铂金稀有十倍并且高度耐热，因此理论上即使它掉进岩浆中也不会熔化。

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At Space Camp, trainees can earn their Space Exploration badge as they build and fire model rockets.

在太空营，学员可以制作和发射火箭模型，以此获得太空探索徽章。

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There were new designs for the plane's rocket engine, landing equipment and the small rockets needed to move it in space.

VOA: special.2010.07.07

Boeing and Lockheed Martin have carried tons of satellites into space on their rockets.

VOA: special.2010.04.28

Right now,few companies have rockets that are able to lift people into space.

VOA: special.2010.04.28

The agency's interest is in a device to boost the launch of space rockets.

ECONOMIST: Maglev trains

He helped to pay for early research on space rockets.

ECONOMIST: Anne Lindbergh

Space, rockets and science sprang out of the pages of the pulp science-fiction magazines he bought in Woolworths for threepence each, and which he could not always afford.

ECONOMIST: Sir Arthur C. Clarke, visionary, died on March 18th, aged 90