利用运载火箭将卫星或探测器送上太空以进行太空科学研究,是航天科技的一项重要途径,但发射火箭耗资巨大,且具风险。为适应不断发展的航天事业的需要,美国一家公司宣布,它将参与实施一个近乎天方夜谭的工程项目:建造通向太空的“电梯”。这种垂直升降装置最终将取代不太安全的火 The use of launch vehicles to send satellites or detectors into space for space science research is an important avenue for aerospace science and technology, but launching rockets is costly and risky. In response to the needs of a growing aerospace industry, a U.S. company announced it will be involved in implementing a near-paradoxical project to build “elevators” that lead to space. This vertical lift will eventually replace unsafe fire