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Chaos 3: 为什么苹果能掉到地上而月球不能掉到地球上

Floor 1 巨大八爪鱼 9/30/14 15:33
http://www.chaos-math.org/en/chaos-iii-some-mechanics
Floor 2 巨大八爪鱼 9/30/14 15:34
Floor 3 巨大八爪鱼 9/30/14 15:34
因为月球的速度太大,只能受地球引力作椭圆运动。到了最低点时因为速度太快又往高处运动了

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