High Quality Content by WIKIPEDIA articles! On February 12, 1961, 00:34:36 UTC, the first planetary probe was launched to Venus by the Soviet Union. The Venus-1 Automatic Interplanetary Station, or Venera 1, was a 643.5 kg probe consisting of a cylindrical body 1.05 meter in diameter topped by a dome, totaling 2.035 meters in height. This was pressurized to 1.2 atmospheres of dry nitrogen, with internal fans to maintain even distribution of heat.

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