Earth's physical shape hasn't changed since last time, but we have just shown that on average our 400 observation sites lie around 2.5 millimeters closer to the center of the Earth,said Axel Nothnagel, a mathematician at Germany's University of Bonn who t
Earth's physical shape hasn't changed since last time, but we have just shown that on average our 400 observation sites lie around 2.5 millimeters closer to the center of the Earth,said Axel Nothnagel, a mathematician at Germany's University of Bonn who t
“自上次测量以来，地球的物理形态没有变化，我们只是发现，我们的400个观察点平均离地心近了2.5毫米左右，”参加此次研究工作的德国波恩大学数学家阿克赛尔?诺特纳格尔说。