Sputnik 2
- Spacecraft and mission profile from the National Space Science Data Center.
- http://nssdc.gsfc.nasa.gov/nmc/tmp/1957-002A.html

Sputnik Revisited
- PBS NewsHour transcript discussing the significance of the Sputnik milestone.
- http://www.pbs.org/newshour/bb/science/july-dec97/sputnik_10-2.html

Sputnik 1
- Spacecraft and mission profile from the National Space Science Data Center.
- http://nssdc.gsfc.nasa.gov/nmc/tmp/1957-001B.html

Sputnik: First Artificial Satellite
- Personal commentary about Sputnik the 40th anniversary of the beginning of the Space Age.
- http://www.batnet.com/mfwright/sputnik.html

Sputnik and The Dawn of the Space Age
- NASA's retrospective story of Sputnik, including photos and references.
- http://www.hq.nasa.gov/office/pao/History/sputnik/

Sputnik
- A lively and colorful collection of articles taking visitors back to those thrilling days of yesteryear, 1957 to be exact. The beginnings of man in space. From The New York Times on AOL.
- http://www.nytimes.com/learning/general/specials/sputnik/