Sputnik Orbits Earth

In October 1957, the Soviet Union launched Sputnik 1, the first artificial satellite to orbit Earth. A polished metal sphere not much larger than a beach ball, it carried little more than a radio transmitter, yet it opened the space age and set off a new phase of Cold War competition. Its significance lay less in its instruments than in what its existence proved: a rocket could place an object into orbit, and by implication could also carry a warhead across continents.

The launch grew out of decades of rocket development. Theorists such as Konstantin Tsiolkovsky had described spaceflight in the early twentieth century, and wartime Germany's V-2 missile showed that long-range rockets were practical. After 1945 both the Soviet Union and the United States gathered German expertise and hardware and built their own missile programs. The Soviet effort was led by chief designer Sergei Korolev, whose R-7 rocket was developed as an intercontinental ballistic missile. Both superpowers had announced plans to launch satellites as part of the International Geophysical Year of 1957–58, a scientific collaboration among many nations.

Sputnik was carried into orbit by a modified R-7 from the Baikonur site in Soviet Kazakhstan. Its radio transmitter emitted simple beeping signals that amateur radio operators around the world could pick up, which made the achievement vivid and difficult to dispute. The satellite circled Earth roughly every hour and a half, and its signals lasted a few weeks before the batteries ran down. The satellite itself later fell from orbit and burned up in the atmosphere in early 1958. Soviet authorities and the press celebrated it as proof of the strength of their scientific and industrial system.

The reaction in the United States combined admiration, anxiety, and political argument. Many Americans feared they had fallen behind in technology and military power, though historians note that the Eisenhower administration was privately less alarmed, partly because it already knew a good deal about Soviet capabilities. Still, the public response was strong. A first American attempt to launch a satellite failed on the pad in December 1957, and the United States succeeded with Explorer 1 in early 1958.

The consequences were wide-ranging. The United States created NASA in 1958 and passed the National Defense Education Act, which increased funding for science and language education. The Soviet Union followed with further firsts, including Yuri Gagarin's flight in 1961, and the rivalry carried through to the Moon landings. Sputnik also paved the way for practical uses of satellites, from weather forecasting and navigation to global communications, and for later treaties governing the use of outer space.