星舰超重型火箭

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美媒:NASA提名局长被撤,美国商业航天新势力受挫
Huan Qiu Shi Bao· 2025-06-02 23:04
Group 1 - The White House has withdrawn the nomination of Jared Isaacman as the NASA Administrator, which was initially proposed by Trump in December last year [1][3] - The Senate committee had approved Isaacman's nomination in late April, but the full Senate vote was pending [1][3] - The withdrawal is attributed to Isaacman's past donations to prominent Democrats, indicating potential political implications [1][3] Group 2 - NASA is currently facing a crisis, with the proposed budget for fiscal year 2026 suggesting a 25% cut to NASA's budget and potential layoffs of thousands of employees [3] - The cancellation of Isaacman's nomination may lead to a leadership vacuum at NASA, causing delays in decision-making and affecting the agency's operations [4] - Isaacman's potential leadership was expected to push NASA towards commercial procurement and efficiency, but his withdrawal introduces uncertainty in strategic direction [4][5] Group 3 - The Artemis program's implementation path may revert to using Boeing's Space Launch System (SLS) rocket, as Isaacman's departure raises questions about the future of the program [4] - Isaacman had advocated for increased scientific missions, contrasting with Trump's budget cuts to science projects, which may now face greater financial pressure [4] - The relationship between NASA and commercial space companies like SpaceX may remain unchanged or face new variables due to the withdrawal of Isaacman's nomination [5] Group 4 - Steven Kwast, a retired Air Force major general, is a leading candidate to replace Isaacman, with the next NASA head expected to fully support Trump's "America First" agenda [5][6]
美媒:“星舰”第八次试射爆炸原因查明,即将第九次发射
Huan Qiu Shi Bao· 2025-05-25 22:59
Core Insights - SpaceX's Starship Super Heavy rocket experienced its eighth test flight failure due to engine malfunctions leading to a chain reaction that resulted in the rocket's self-destruction in mid-air [1][3] - The Federal Aviation Administration (FAA) has approved the investigation report and subsequent flight tests, with the ninth test flight scheduled for May 27 [1][4] Group 1: Test Flight Failures - The Starship's previous test flights have garnered significant attention, but both of its attempts in 2023 ended in failure [1] - The seventh test flight on January 17 saw the Starship spacecraft lose control during re-entry, leading to self-destruction due to high vibration intensity causing fuel leakage and fire [1] - The eighth test flight on March 6 faced a similar fate, with the first stage successfully recovering but the spacecraft disintegrating mid-air [1][3] Group 2: Investigation Findings - The investigation report indicated that the failure during the eighth test was due to a hardware fault in the central engine, causing unintended mixing and ignition of propellants [3] - The report highlighted that the failure was not the same as the previous test, with a "flash" event occurring in the engine center leading to a shutdown of one engine and subsequent failures in adjacent engines [3] Group 3: Remedial Actions - SpaceX's corrective plan includes increasing preload at critical connections, optimizing propellant discharge systems, and introducing a new generation of engines to enhance reliability [3] - The first stage of the Starship successfully recovered but experienced issues with two engines failing during the retrofire phase and one during landing, attributed to localized overheating [3] Group 4: Upcoming Test Flight - The ninth test flight will take place at Boca Chica, Texas, with plans to test multiple objectives, including deploying eight prototype Starlink satellites [4] - For this mission, SpaceX will not attempt the previously validated pinpoint landing and recovery of the first stage, opting instead for a soft landing in the Gulf of Mexico [4]