月は地球と比べて半径が１／４、質量も地球の約１／８１と小さいため、重力も１／６しかありません。そのため、月では体がとても軽く感じられ、高くとびはねることができます。ワイヤーと錘を使った装置で１／６の重力を疑似体験できます。 The gravity on the moon is only one-sixth the gravity we feel on Earth. This means that people standing on the moon feel much lighter than they did back home, and they can jump much higher. The wires and counterweights of this machine give you a chance to experience that lunar gravity right here on Earth!