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Pioneer 9 (German Wikipedia)

Analysis of information sources in references of the Wikipedia article "Pioneer 9" in German language version.

refsWebsite
Global rank German rank
3nasa.gov
75th place
133rd place

nasa.gov

nssdc.gsfc.nasa.gov

  • Pioneer 9. NSSDC, abgerufen am 1. August 2014 (englisch).

solarsystem.nasa.gov

  • NASA: Pioneer 9. 5. August 2019, abgerufen am 12. September 2023 (englisch).

nasa.gov

  • Asif A. Siddiqi: Beyond Earth: A Chronicle of Deep Space Exploration. (PDF) In: NASA History Series. NASA, S. 88, abgerufen am 4. August 2020 (englisch): „NASA maintained contact with Pioneer IX until 19 May 1983. Subsequent attempts to use Search for Extraterrestrial Intelligence (SETI) equipment to establish contact with the probe on 3 March 1987 failed, and the Agency officially declared the spacecraft inactive“