Vostok 4

Vostok 4 was a mission in the Soviet space program. It was launched a day after Vostok 3 with cosmonaut Pavel Popovich on board - the first time that more than one manned spacecraft was in orbit at the same time. The two capsules came within 5 km of one another and ship-to-ship radio contact was established.

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The mission went largely as planned, despite a malfunction with the Vostok's life-support systems that meant that cabin temperature dropped down to 10 ?C. The flight was terminated early, after a misunderstanding by ground control, who believed that Popovich had given them a code-word asking to be brought back ahead of schedule.

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The re-entry capsule is now on display at the NPO Zvezda Museum in Moscow, but it has been modified to represent the Voskhod 2 capsule.

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Vostok: Vostok (, translated as "East") may refer to one of the following....

Soviet space program: From World War II until its breakup, the Soviet Union undertook projects to build rockets, craft, and instruments for war and exploration of space....

Vostok 3: Vostok 3 was a mission in the Soviet space program....