After circling Earth twice, it would slam back into the atmosphere at more than 20, 000mph (32, 000kph), eclipsing the 17, 500mph (28, 000kph) speedof a returning space shuttle.
This is not a speed you will sense, as in G force when a shuttle takes off from the surface of the Earth.
就如航天飞机从地球表面升空时，其力量是以“G”计算的，因而这种速度你是不能感知的。
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But scientists at the NASA space center have developed a gun built to launch dead chickens at the windshields of airliners, military jets and the space shuttle, all traveling at their top speed.