There's another one named Didymous zipping through space.

还有一个叫Didymous的小行星在太空中穿梭。

Its destination, a near-Earth asteroid named Didymous and its moonlet.

它的目的地是一颗名为Didymous的近地小行星及其卫星。

The planetary society says that if all goes according to the plan, the collision will push the moonlet slightly closer to Didymous and shorten its orbit around the asteroid by a few minutes.

行星协会表示，如果一切按计划进行，撞击将使小卫星更加靠近Didymous小行星一点，并将小卫星围绕小行星的轨道缩短几分钟。