protoplanet
1. 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)。
2. In the meantime the protoplanet cores were proceeding to consolidate.
在此期间,原行星的核开始凝成。