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2006年1月15日,美国“星尘” 号探测器结束了历时7年、跨越46亿千米的太空旅程,重达46千克的返回舱携带着彗星微粒和星际尘埃样本安全返回地球。返回舱进入大气层的速度为每小时46444千米,是音速的45倍,这是迄今人造物体的最高速度。高速摩擦所产生的返回舱表面温度达3000摄氏度,多次减速又造成了返回舱剧烈震动, 而返回舱则始终经受住了这些考验,完好地带回了人类首次从彗星采
On January 15, 2006, the “Stardust” detector in the United States ended its seven-year space journey of 4.6 billion kilometers and the return capsule of 46 kg carried safe samples of comet particles and interstellar dust back to Earth . The return capsule into the atmosphere at a speed of 46444 km per hour, 45 times the speed of sound, which is by far the highest speed of man-made objects. High-speed friction generated by the return capsule surface temperature of 3000 degrees Celsius, multiple deceleration has caused violent vibration of the return capsule, and the return capsule has always stood the test of all, well back to humans for the first time from the comet