据环球时报综合报道，美国总统特朗普与美国富豪、太空探索技术公司（SpaceX）创始人马斯克近日发生激 烈争吵后，美国政府和美国国家航空航天局（NASA）对于当前美国航天项目严重依赖SpaceX的情况，已经 紧急寻求该公司的替代者。 资料图 美国"动力"网站"战区"频道介绍称，当前美国的航天发射活动严重依赖SpaceX。去年该公司使用"猎鹰9"号 和"猎鹰重型"运载火箭进行了134次轨道发射，比世界上其他公司的总和还多。美国智库企业研究所的数据 表明，SpaceX发射的卫星总数占2024年全球入轨卫星总数的84%。 《华盛顿邮报》称，SpaceX的竞争对手追赶进度缓慢，这使得该公司在航天发射方面的主导地位没有受到多 少挑战，美国政府也没有多少选择。面对这样的局面，美国政府和NASA已经询问了至少3家商业航天公司 ——火箭实验室、斯托克太空公司和蓝色起源公司，了解这些公司的火箭研发进度以及何时能为美国政府任 务提供发射服务。 但总体而言，这些公司的航天发射能力还处于初级阶段，在可靠性上无法与成熟可靠的SpaceX火箭相提并 论，也难以挑战SpaceX可重复使用火箭带来的低成本优势。 马斯克则又回帖指责特朗普的说法 ...

Group 1 - The core issue is the U.S. government's and NASA's urgent search for alternatives to SpaceX due to the recent conflict between President Trump and Elon Musk, which has raised concerns about the dependency on SpaceX for U.S. space missions [1][3] - Following the fallout, Trump threatened to cancel SpaceX's government contracts, while Musk responded by threatening to retire the Dragon spacecraft, indicating a volatile relationship that poses risks to NASA's operations [3] - SpaceX currently dominates U.S. space launches, having conducted 134 orbital launches last year, which is more than the total of all other companies combined, and is projected to account for 84% of the global satellite launches in 2024 [3][4] Group 2 - The U.S. government and NASA have reached out to at least three commercial space companies—Rocket Lab, Stoke Space, and Blue Origin—to assess their rocket development progress and potential launch capabilities for government missions [3] - However, these companies' launch capabilities are still in the early stages and cannot match the reliability and cost-effectiveness of SpaceX's reusable rockets, making SpaceX the only viable option for high-value military launches [4] - SpaceX's Crew Dragon spacecraft is currently the only vehicle capable of transporting astronauts to the International Space Station, filling a critical gap since the retirement of the Space Shuttle in 2011 [5]