Two identical NASA spacecraft are preparing to enter areas in space known as the Lagrangian points where remains of this mystery protoplanet may be hiding.

• NASA将发射2个完全相同的航天器到天空中的拉格朗日点，去寻找那个神秘行星的遗迹（拉格朗日点是那个神秘行星残余最可能的藏身处）。