太空人造卫星知多少自苏联１９５７年向太空发射第一颗人造地球卫星以来，到１９９４年７月底，人类已向太空发射了４５１１颗人造地球卫星，其中１００颗左右是军事卫星。在太空开发领域，美国和前苏联（现在的独联体）居领先地位，所拥有的人造地球卫星也占绝对多数。从... Since the Soviet Union launched the first man-made Earth satellite into space in 1957, by the end of July 1994, mankind has launched 4,511 man-made earth satellites in space, of which about 100 are military satellites. In the field of space development, the United States and the former Soviet Union (now the Commonwealth of Independent States) hold the leading position and possess the absolute majority of man-made earth satellites. From...