The way you would put it to a nine-year-old is to say, "If a meteorite was coming to hit the Earth, how would you figure out if it was going to or not?"
Чи 9 настай хүүхдэд "Хэрвээ солир дэлхий рүү ойртож байвал явж буй үгүйг нь яаж мэдэх вэ?"