Возможно на Луна “смесь“ из двух столкнувшихся спутников Земли? Миссия НАСА GRAIL ищет ответ на этот вопрос

Did our planet once have two moons? Some researchers say so. Moreover, the missing satellite might still be up there--splattered across the far side of the Moon. NASA’s GRAIL mission could help confirm or refute the “two moon“ hypothesis.