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1 引 言根据报道ＮＡＳＡ于 1 972年、 1 973年先后发射的“先驱者 1 0号”、“先驱者 1 1号”两个行星探测器在行将迈出太阳系的飞行后期 ,发现有明显的减速现象 ,经计算后了解到减速的原因来自一个神秘的不明引力—Ｆｇ ,量值约为地球引力的 1 0 0亿分之一。其引力值虽小 ,
1 Introduction According to reports of NASA’s “Pioneer 10” and “Pioneer No.1 1” two planetary probes, which were successively launched in 1972 and 1973, were found to have significant deceleration in the later flight of the solar system Phenomenon, calculated to understand the reasons for the deceleration from a mysterious unknown force -Fg, the value of about one hundred billionth of Earth’s gravity. Although its gravity value is small,