当年,前苏联发射的世界第一颗人造卫星,对人类在宇航领域的发展有着深远的影响。当时,那颗重量只有80多公斤的小小卫星进入太空的时候,谁也想象不到后来人类的足迹会踏上月球;太空探测器会脱离太阳系,探索宇宙深处的秘密。 That year, the world’s first satellite launched by the former Soviet Union had a profound impact on the development of mankind in the field of astronautics. At that time, when the tiny satellite weighing only 80 kilos entered space, no one could imagine that later human footprints would set foot on the moon. The space probe would be out of the solar system and explore the secrets of the universe.