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The Sputnik programme was a Soviet Union spacecraft programme. Sputnik 1, the first satellite in the programme, was launched on October 4, 1957. This was the first man-made satellite ever to enter orbit.
The United States was very surprised when the Soviet Union sent Sputnik 1 into space. It did not want to fall behind. So, it began spending more money on science and education. This was when the Space Race between the Soviet Union and the United States began.
- "Sputnik 1". NASA NSSDC. http://nssdc.gsfc.nasa.gov/nmc/masterCatalog.do?sc=1957-001B. Retrieved 2011-12-24.
- Calmes, Jackie (2010-12-06). "Obama Calls for New ‘Sputnik Moment’". The New York Times. http://thecaucus.blogs.nytimes.com/2010/12/06/obama-calls-for-new-sputnik-moment. Retrieved 2011-12-24.
- Siddiqi, Asif A. (2003). Sputnik and the Soviet Space Challenge. University of Florida Press. p. 155. .