NSF - NASASpaceflight.com· @NASASpaceflight · X·· 5 天前AI 评分31
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1957年的今天，苏联成功将史上第一个人造物体送入地球轨道。 Sputnik 1 从拜科努尔发射场升空，持续运行 21 天，发出易于追踪的无线电信号。 该航天器于 1958 年 1 月 4 日再入地球大气层时烧毁。
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On this day in 1957, the Soviet Union successfully launched the first-ever human-made object to orbit the Earth.
Sputnik 1 launched from the Baikonur Cosmodrome and remained operational for 21 days, sending an easy-to-track radio signal.
The spacecraft burned up on January 4, 1958, when it re-entered Earth's atmosphere.
来源：NSF - NASASpaceflight.com · x.com