Retrorocket

（重定向自Braking rocket）

Descent of a martian lander halted by retrorockets. (computer generated impression)

A retrorocket (short for retrograde rocket) is a rocket engine providing thrust opposing the motion of a vehicle, thereby causing it to decelerate. They have mostly been used in spacecraft, with more limited use in short-runway aircraft landing. New uses are emerging in the 2010s for retro-thrust rockets in reusable launch systems.

单词	Braking rocket
释义	Braking rocket 英语百科 Retrorocket （重定向自Braking rocket） A retrorocket (short for retrograde rocket) is a rocket engine providing thrust opposing the motion of a vehicle, thereby causing it to decelerate. They have mostly been used in spacecraft, with more limited use in short-runway aircraft landing. New uses are emerging in the 2010s for retro-thrust rockets in reusable launch systems.
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