関連ワード:
has the earth's rotation slowed down is the earth's rotation slowing down is the earth's rotation slowing down or speeding up does the earth's rotation slow down is the earth's rotation slowing down or speeding up slightly over time does the earth's rotation slow down every year is the earth's revolution slowing down does the earth spin slow down is the earth's rotation speed slowing down is the earth's core rotation slowing down
