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- Q1578461 subject Q6938843.
- Q1578461 subject Q7142233.
- Q1578461 subject Q8152085.
- Q1578461 subject Q8784928.
- Q1578461 subject Q9732800.
- Q1578461 abstract "Venera 2MV-2 No.1, also known as Sputnik 21 in the West, was a Soviet spacecraft, which was launched in 1962 as part of the Venera programme, and was intended to make a flyby of Venus. Due to a problem with the rocket which launched it, it failed to leave low Earth orbit, and reentered the atmosphere a few days later. It was the second Venera 2MV-2 spacecraft, both of which failed to leave Earth orbit.Venera 2MV-2 No.1 was launched at 00:59:13 UTC on 12 September 1962, atop a Molniya 8K78 carrier rocket flying from Site 1/5 at the Baikonur Cosmodrome. The rocket performed nominally up until cutoff of the Blok I stage, following injection into a low Earth orbit. Following cutoff, one of the oxidiser valves failed to close, and liquid oxygen was allowed to flow into the combustion chamber of one of the vernier thrusters. The vernier thruster exploded, causing the rocket to tumble out of control. This led to the formation of bubbles in the upper stage oxidiser pump, which caused the upper stage engine to fail less than a second after ignition. It reentered the atmosphere on 14 September 1962, two days after it had been launched.The designations Sputnik 25, and later Sputnik 21 were used by the United States Naval Space Command to identify the spacecraft in its Satellite Situation Summary documents, since the Soviet Union did not release the internal designations of its spacecraft at that time, and had not assigned it an official name due to its failure to depart geocentric orbit.".
- Q1578461 wikiPageWikiLink Q1198578.
- Q1578461 wikiPageWikiLink Q15180.
- Q1578461 wikiPageWikiLink Q1579577.
- Q1578461 wikiPageWikiLink Q177477.
- Q1578461 wikiPageWikiLink Q192144.
- Q1578461 wikiPageWikiLink Q2580456.
- Q1578461 wikiPageWikiLink Q313.
- Q1578461 wikiPageWikiLink Q618153.
- Q1578461 wikiPageWikiLink Q663611.
- Q1578461 wikiPageWikiLink Q6938843.
- Q1578461 wikiPageWikiLink Q7142233.
- Q1578461 wikiPageWikiLink Q737809.
- Q1578461 wikiPageWikiLink Q763402.
- Q1578461 wikiPageWikiLink Q8152085.
- Q1578461 wikiPageWikiLink Q828032.
- Q1578461 wikiPageWikiLink Q847798.
- Q1578461 wikiPageWikiLink Q8784928.
- Q1578461 wikiPageWikiLink Q920454.
- Q1578461 wikiPageWikiLink Q9732800.
- Q1578461 type Place.
- Q1578461 type ArtificialSatellite.
- Q1578461 type CelestialBody.
- Q1578461 type Location.
- Q1578461 type Place.
- Q1578461 type Satellite.
- Q1578461 type Thing.
- Q1578461 comment "Venera 2MV-2 No.1, also known as Sputnik 21 in the West, was a Soviet spacecraft, which was launched in 1962 as part of the Venera programme, and was intended to make a flyby of Venus. Due to a problem with the rocket which launched it, it failed to leave low Earth orbit, and reentered the atmosphere a few days later.".
- Q1578461 label "Venera 2MV-2 No.1".