| 现在约有 5000个人造卫星在天上飞 |
| 送交者: 明君小雪 2020月06月25日10:58:18 于 [五 味 斋] 发送悄悄话 |
| 回 答: 啊？？ 让我好好想想。 由 明君小雪 于 2020-06-25 10:56:30 |
Number of launches to date (1957-2018)In the history of satellites, since the launch of first satellite Sputnik in 1957, around 8,378 satellites have been sent to space, as per the data by UNOOSA. These days there are 4994 satellites in orbit, out of which only 7 are revolving around planets other than earth. |
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