根据国会预算办公室（CBO）的最新评估，美国计划部署的“金穹”天基导弹拦截器星座，其总成本预计将高达7430亿美元，这一数字涵盖了未来二十年的全部费用。该庞大系统由约7800颗卫星构成，旨在从太空层面构建一道针对弹道导弹的全球防御屏障。
这项耗资巨大的计划引发了关于其财政可行性与战略必要性的广泛讨论。巨额开支不仅涉及卫星的研发、制造与发射，还包括长达二十年的持续运营与维护成本。分析指出，如此规模的投资将对国防预算构成严峻考验，并可能挤压其他关键军事项目的资源。
与此同时，该计划预计将为主要的国防承包商，如
太空防御能力的构建正成为大国战略竞争的新焦点。“金穹”星座的设想，体现了美国在确保太空优势、应对新兴威胁方面的雄心。但其最终能否从蓝图变为现实，不仅取决于技术进步，更将受到长期财政规划与政治共识的深刻影响。
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