The shape and perigee of artificial satellite orbits shall continually variate due to caused by the atmospherical drag and the earth gravity.
人造地卫星轨道气阻力和地引力场等因动,其形状和近地点位置将不断改变。
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On October 4,1957, when Sputnik went into orbit, people were so upset.
1957 年 10 月 4 日,当人造球卫星进入轨道的时候人们异常不满。
The first artificial Earth satellite in the world has now been created. This first satellite was today successfully launched in the USSR.
“第一颗人造球卫星已经,天,苏联成功发射第一颗卫星。”
Jocelyn Bell Burnell The launch in 1957 by the Soviet Union of the first artificial Earth satellite, Sputnik 1, was a turning point in history, both politically and scientifically.
乔斯林·贝尔·伯内尔 1957年, 苏联发射了首颗人造球卫星“斯普特尼克1号” ,这一事件在历史具有转折意义,无论是在政治层面还是科学领域。
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