NASA's double sledgehammer shot to the moon succeeded early this morning when an empty rocket stage and a lunar probe each crashed into separate craters.

随着一级空火箭和一个月球探测器分别撞击到月球表面不同的两座环形山上，美国航空航天局（NASA）的大型“双重撞月”行动在今天早晨取得了成功。

youdao

That project involves crashing a rocket stage into the moon's south pole.

VOA: special.2009.09.30

So this year NASA sent up a spacecraft and sent the rocket stage right into the moon to 'bomb' the moon, basically,and see what came up.

VOA: standard.2009.12.24

Two-and-one-half minutes after the Apollo Eleven launch, the first-stage rocket separated from the spacecraft.

VOA: special.2009.07.15

All the major events such as rocket-stage separation, fairing separation, and the ejection of the dummy payload occurred on cue.

BBC: Orbital's Antares rocket makes test flight

The firm, established by Amazon entrepreneur Jeff Bezos, has a design for a capsule and two-stage rocket.

BBC: US firms target astronaut flights

The concept calls for a two-stage rocket that would be powered by engines burning liquid oxygen and kerosene.

BBC: Science & Environment