While various military branches are developing drones and low-cost missiles, they remain committed to advanced next-generation platforms, such as a new F-47 fighter with a projected unit cost of $300 million and the B-21 stealth bomber, which may exceed $600 million per aircraft.
Under the original Artemis architecture, NASA planned on multiple versions of the SLS rocket, ranging from the "Block 1" vehicle currently in use to a more powerful EUS-equipped Block 1B and eventually an even bigger Block 2 model using advanced solid rocket boosters. The latter two versions required use of a taller mobile launch gantry, already well under construction at the Kennedy Space Center.
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美国航天局公布猎户座飞船拍摄的宇宙图集
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