Description: 火箭是一種常用於將航天器從地球表面發射到外太空的裝置。為此，火箭通常由火箭發動機和燃料箱組成。火箭發動機也可用於在太空中控制航天器的運動，改變速度或進行航向修正。火箭發動機的基本原理是產生高速粒子流，通常通過燃燒火箭燃料來實現。當這種粒子流朝特定方向噴出時，火箭發動機就會向相反方向加速，這源於動量守恆這一物理基本定律。需要注意的是，這種粒子流不需要推靠任何物體來產生作用：火箭即使在近乎真空的太空中也能完美運行。

Related Terms:

• 航天器

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This is an automated transliteration of the simplified Chinese translation of this term

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