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The Dawn of the Space Age

The course of history changed on October 4, 1957, when the Soviet Union successfully launched Sputnik 1. The world’s first artificial satellite was about the size of a beach ball (58 cm or 22.8 inches in diameter), weighed only 83.6 kg or 183.9 pounds, and took about 98 minutes to orbit Earth on its elliptical path. That launch ushered in new political, military, technological, and scientific developments. While the Sputnik launch was a single event, it marked the start of the space age and the U.S.–U.S.S.R. space race.

Model of the Sputnik satellite on a black background
A replica of Sputnik I at the Smithsonian National Air and Space Museum.
Smithsonian Institution

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Background

The story begins in 1952, when the International Council of Scientific Unions decided to establish the International Geophysical Year (IGY) from July 1, 1957 through December 31, 1958. Scientists knew that solar activity would be at a high point during that time. In October 1954, the council adopted a resolution calling for artificial satellites to be launched during the IGY to map the Earth’s surface. 

In July 1955, the White House announced plans to launch an Earth-orbiting satellite for the IGY and solicited proposals from various Government research agencies to undertake development. In September 1955, the Naval Research Laboratory’s Vanguard proposal was chosen to represent the U.S. during the IGY. 

The Sputnik launch on October 4, 1957, changed everything. As a technical achievement, Sputnik caught the world’s attention and the American public off-guard. Its size was more impressive than Vanguard’s intended 3.5-pound payload. In addition, the public feared that the Soviets’ ability to launch satellites also translated into the capability to launch ballistic missiles that could carry nuclear weapons to the U.S. Then the Soviets succeeded again: On November 3, Sputnik 2 was launched, carrying a much heavier payload, including a dog named Laika. 

Immediately after the Sputnik 1 launch in October, the U.S. Defense Department responded to the political furor by approving funding for another U.S. satellite project. As a simultaneous alternative to Vanguard, Wernher von Braun and his Army Redstone Arsenal team began work on the Explorer project. 

On January 31, 1958, the United States successfully launched Explorer 1. This satellite carried a small scientific payload that showed the existence of the magnetic radiation belts around the Earth, named after principal investigator James Van Allen. The Explorer program continued as a successful ongoing series of lightweight, scientifically useful spacecraft.

The Sputnik launch also led directly to the creation of NASA. In July 1958, Congress passed the National Aeronautics and Space Act (commonly called the “Space Act”), which created NASA from the National Advisory Committee for Aeronautics (NACA) and other government agencies.

Activities in a blockhouse during the launch of Jupiter-C/Explorer 1 on January 31, 1958.
Activities in a blockhouse during the launch of Jupiter-C/Explorer 1 on January 31, 1958.

Timeline

1997

  • July 1: Beginning of International Geophysical Year
  • Oct. 4: USSR – Sputnik 1 (83.6 kg) launched 
  • Nov. 3: USSR – Sputnik 2 (508.3 kg) is launched with a dog named Laika aboard
  • Nov. 13: USA – Eisenhower makes his first public statement calling for the establishment of a civilian U.S. space agency
  • Dec. 6: USA – Vanguard TV-3 explodes on launch pad 

1998

  • Jan. 31: USA – Explorer 1 (14 kg), America’s first satellite, discovers the Van Allen radiation belts 
  • Feb. 3: USSR – First try to launch Sputnik 3 fails 
  • Feb. 5: USA – A second Vanguard try fails 
  • Mar. 5: USA – Explorer 2 fails to orbit 
  • Mar. 17: USA – Vanguard 1 (1.47 kg) successfully orbits, takes geodetic measurements of Earth 
  • Mar. 26: USA – Explorer 3 orbits, collects radiation and micrometeoroid data 
  • Apr. 28: USA – Another Vanguard fails to orbit (third failure)
  • May 15: USSR – Sputnik 3 (1,327 kg) orbits, carrying large array of scientific instruments, but tape recorder fails, so it can’t map Van Allen belts 
  • May 27: USA – Vanguard fails for the fourth time 
  • June 26: USA – Vanguard fails for fifth time 
  • July 26: USA – Explorer 4 orbits and maps Van Allen radiation belts for over 2 months 
  • July 29: USA – Eisenhower signs the National Aeronautics and Space Act of 1958
  • Aug. 19: USA – T. Keith Glennan is sworn in as NASA’s first administrator
  • Aug. 24: USA – Explorer 5 fails to orbit 
  • Sep. 26: USA – Vanguard fails for the sixth time
  • Oct. 1: USA – NASA opens for business
  • Dec. 31: End of the IGY

NASA Publications and Articles

The shiny sphere-shaped Vanguard II satellite is prepared for launch in 1959.
The sphere-shaped Vanguard II satellite reflects the scene in this photo from the preparations for its launch in 1959.
NASA Goddard Archives

Documents

These collections are not meant to be exhaustive; they are meant to get researchers started in the right direction. Normally, we only include NASA-created material, but because Sputnik predates NASA and was instrumental in the creation of NASA as an agency, the papers at the Eisenhower Library are a vital part of the story.

Translations of Soviet Documents

Documents edited and translated by Dr. Asif Siddiqi

U.S. Documents