The plan was to launch it with the R-7, an intercontinental ballistic missile in development since 1954. But the rest of the world paid no attention to the vague pronouncements of a possible launch that had been appearing in the Soviet press; everybody outside the Soviet Union knew the United States would launch the world’s first satellite.
苏联工程师们在1956年1月开始设计人造地球卫星。计划是用从1964年开始设计开发的R-7洲际弹道导弹发射卫星。但是，全世界对于苏联报纸上出现的可能进行发射的含糊不清的报导并不予以关注。苏联以外的所有人都知道美国将会发射第一颗人造地球卫星。