欲破SpaceX垄断，“火神”火箭迎历史性发射

Group 1 - The U.S. government is urgently seeking alternatives to SpaceX due to increasing disagreements with the company [1] - The United Launch Alliance (ULA) is set to launch its new "Vulcan" rocket for the first military space mission on August 12, which will carry the experimental navigation satellite NTS-3 [1][3] - The "Vulcan" rocket is designed to compete with SpaceX's Falcon 9, which has gained significant market share in military launches [3][4] Group 2 - ULA has been a long-term partner of the U.S. Department of Defense for space launches, but SpaceX's Falcon 9 has challenged its position since receiving certification for national security space launches [3] - The "Vulcan" rocket features a reusable design and is equipped with two BE-4 engines, with a maximum payload capacity of 27.2 tons and a geostationary orbit capacity of 15.3 tons [3] - The launch of NTS-3 represents a significant advancement for the "Vulcan" rocket and is crucial for enhancing the U.S. military's satellite navigation capabilities [4]