動態消息貼文
AI Overview
「獵戶座太空船返回地球」指的是美國太空總署阿爾忒彌斯計畫中的一項關鍵機動操作,該操作利用月球引力改變方向,在不完全依賴自身引擎的情況下返回地球。
這個過程是自由返回軌道的重要組成部分。自由返回軌道是一條專門設計的「8」字形路徑,如同安全網一般,確保即使主引擎失效,太空人也能安全返回地球。
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機動操作的關鍵要素:引力輔助:當獵戶座太空船接近月球背面時,月球引力會自然地改變太空船的飛行軌跡,將其「甩」回地球。
動力飛越返回:雖然返回過程可以被動完成,但通常會進行一次「動力飛越返回」操作,以正式確定太空船的著陸軌跡,確保其精準著陸。
返回之旅:經過這次擺動後,返回艙將返回地球,最終速度將達到約 25,000 英里/小時(40,000 公里/小時),然後重返大氣層。
"Swing Orion back to Earth" refers to critical maneuver in NASA's Artemis missions where the spacecraft uses the Moon's gravity to change direction and return to Earth without relying solely on its engines.
This process is a key part of the free-return trajectory, a specifically designed, figure-eight path that acts as a safety net to ensure the crew can return home even if the main engine fails.
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Key Aspects of the Maneuver:Gravitational Assist: As the Orion capsule approaches the far side of the Moon, lunar gravity naturally curves the spacecraft’s path, "slinging" it back toward Earth.
Return Powered Flyby: While the return can happen passively, a "Return Powered Flyby" is often performed to officially set the trajectory for a precise landing spot.
The Journey Back: After this swing, the capsule travels back to Earth, eventually reaching speeds of roughly 25,000 mph (40,000 km/h) before re-entering the atmosphere.
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The phrase emphasizes both the engineering safety of using physics (gravity) over fuel and the successful completion of the deep-space mission (Artemis I or II).
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