Vostok 4
Encyclopedia
Vostok 4 was a mission in the Soviet space program
Soviet space program
The Soviet space program is the rocketry and space exploration programs conducted by the former Union of Soviet Socialist Republics from the 1930s until its dissolution in 1991...

. It was launched a day after Vostok 3
Vostok 3
Vostok 3 was a spaceflight of the Soviet space program intended to determine the ability of the human body to function in conditions of weightlessness and test the endurance of the Vostok 3KA spacecraft over longer flights...

 with cosmonaut
Astronaut
An astronaut or cosmonaut is a person trained by a human spaceflight program to command, pilot, or serve as a crew member of a spacecraft....

 Pavel Popovich
Pavel Popovich
- Biography :He was born in Uzyn, Kiev Oblast of Soviet Union . to Roman Porfirievich Popovich and Theodosia Kasyanovna Semyonov. He had two sisters and two brothers ....

 on board—the first time that more than one manned spacecraft were in orbit at the same time. The two Vostok capsules
Vostok spacecraft
The Vostok was a type of spacecraft built by the Soviet Union. The first human spaceflight in history was accomplished on this spacecraft on April 12, 1961, by Soviet cosmonaut Yuri Gagarin....

 came within 6.5 km (4 mi) of one another and ship-to-ship radio contact was established.

The cosmonauts of Vostok 3 and 4 did not attempt rendezvous. At one point the craft came within a few kilometers of each other and Popovich later reported at a news conference that he saw the other craft from orbit. Popovich is quoted as saying, "I saw it at once," referring to seeing Vostok 3 in orbit. "It looked like a very small moon in the distance."

The Vostok 3 and 4 spacecraft landed about 200 km apart, south of Karaganda
Karaganda
Karagandy , more commonly known by its Russian name Karaganda, , is the capital of Karagandy Province in Kazakhstan. It is the fourth most populous city in Kazakhstan, behind Almaty , Astana and Shymkent, with a population of 471,800 . In the 1940s up to 70% of the city's inhabitants were ethnic...

, Kazakhstan
Kazakhstan
Kazakhstan , officially the Republic of Kazakhstan, is a transcontinental country in Central Asia and Eastern Europe. Ranked as the ninth largest country in the world, it is also the world's largest landlocked country; its territory of is greater than Western Europe...

.

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 (50 °F). The flight was terminated early after a misunderstanding by ground control, who believed that Popovich had given them a codeword asking to be brought back ahead of schedule.

The re-entry capsule is now on display at the NPO Zvezda Museum in Moscow
Moscow
Moscow is the capital, the most populous city, and the most populous federal subject of Russia. The city is a major political, economic, cultural, scientific, religious, financial, educational, and transportation centre of Russia and the continent...

, but it has been modified to represent the Voskhod 2
Voskhod 2
Voskhod 2 was a Soviet manned space mission in March 1965. Vostok-based Voskhod 3KD spacecraft with two crew members on board, Pavel Belyaev and Alexei Leonov, was equipped with an inflatable airlock...

 capsule.

Crew

Backup crew

Reserve crew

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