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出师未捷美国航宇局２００２年８月１５日宣布，其造价达１．５８亿美元的“彗核之旅”探测器在离开地球轨道去探索彗星之际与地面失去联系。联络中断时，探测器位于印度洋上空约２２５公里处，并计划启动发动机脱离地球轨道而进入彗星围绕太阳运行的轨道。点火时由于探测器距
Unprecedented Skill NASA announced on August 15, 2002 that its $ 158 million “Comet Tour” detector loses contact with the ground as it exits Earth orbit to explore comets. At the time of the liaison, the probe was located about 225 kilometers above the Indian Ocean and planned to start the engine off orbit into orbit around the sun. Ignition due to detector distance