制动火箭是运载火箭和宇航器上的一种小型辅助火箭发动机。
... 制动发动机点火时间 time for retrofire 制动火箭 braking rocket 制动火箭发动机 retrorocket unit ...
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发射后差不多三天时间,制动火箭启动了,阿波罗8号飞船进入了月球轨道。
Nearly three days after launch, the braking engines fired and the Apollo 8 capsule went into orbit around the moon.
最后,在围绕地球的轨道运行的时候,计算机会精确地计算出应该在什么时候发射制动火箭以重返大气层。
Finally, when in orbit round the earth, the calculators calculate exactly when to fire the retro-rocket to effect re-entry.
27岁宇航员首次任务只持续了108分钟,但是过程充满了戏剧性:数据传输中断、天线故障、制动火箭与部件分离。
The 27-year-old cosmonaut's mission lasted just 108 minutes and was fraught with drama: a break in data transmission, glitches involving antennas, a retrorocket and the separation of modules.
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