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High Quality Content by WIKIPEDIA articles! Venera 4 (Russian: -4, meaning Venus; manufacturer's designation: 1V (V-67)) was a probe in the Soviet Venera program for the exploration of Venus. Venera-4 was the first successful probe to perform in-place analysis of the environment of another planet. It was also the first probe to land on another planet. Venera 4 provided the first chemical analysis of the Venusian atmosphere, showing it to be primarily carbon dioxide with a few percent of nitrogen and below one percent of oxygen and water vapors.

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High Quality Content by WIKIPEDIA articles! Venera 4 (Russian: -4, meaning Venus; manufacturer's designation: 1V (V-67)) was a probe in the Soviet Venera program for the exploration of Venus. Venera-4 was the first successful probe to perform in-place analysis of the environment of another planet. It was also the first probe to land on another planet. Venera 4 provided the first chemical analysis of the Venusian atmosphere, showing it to be primarily carbon dioxide with a few percent of nitrogen and below one percent of oxygen and water vapors.