Vostok I capsule on display at the [[RKK Energiya museum]]]]
El 12 d'abril de 1961, nel ''Vostok 3KA-3'' ([[Vostok 1]]), Gagarin sedría'l primer humanu en viaxar a l'[[Espaciu esterior|espaciu esterior]], y tamién el primer n'orbitar la Tierra. El so nomatu na misión sedría ''Kedr'' ([[Cedru]]).
Nel esnale, Gagarin cuntaría-y al [[Secretariu Xeneral del Partíu Comunista de la Xunión Soviética|llíder soviéticu]] [[Nikita Khrushchev]] que dementres la reentrada na órbita Terrestre, elli xiblara'l cantar "La Tierra siente, la Tierra conoz" ([[Rusu]] "Родина слышит, Родина знает"). Les dos primeres llínies del cantar son: ''La Tierra siente, la Tierra conoz/Cuando'l so fíu esnala'' (Cantar patrióticu escritu por [[Yevgeniy Dolmatovsky]] y melodía de [[Dmitri Shostaovich]]).
Dalgunes fontes diríen que Gagarin comentara dementres el viaxe: "Nun veo dalu Dios equi enrriba".
However, no such words appear in the verbatim record of his conversations with Earth-based stations during the spaceflight. <ref name="cosmoworld"/> In a 2006 interview, Gagarin's friend Colonel Valentin Petrov stated that the cosmonaut never said such words, and that the quote originated from [[Nikita Khrushchev]] 's speech at the plenum of the [[Central Committee of the CPSU]] about the state's [[USSR anti-religious campaign (1958–1964)|anti-religion campaign]] , saying "Gagarin flew into space, but didn't see any god there. "<ref name="ir73"/> Petrov also said that Gagarin had been baptised into the [[ Orthodox Church]] as a child, and a 2011 ''Foma'' magazine article quoted the rector of the Orthodox church in [[ Star City, Russia| Star City]] saying, "Gagarin baptized his elder daughter Yelena shortly before his space flight; and his family used to celebrate Christmas and Easter and keep icons in the house."<ref name=" ir8361"/>
After Vostok 1==
[[File:Convert ru kosmos077.jpg|thumb|left|upright|
A postcard with an image of Yuri Gagarin]]
After the flight, Gagarin became a worldwide celebrity, touring widely abroad. He visited Italy, Germany, Canada, Brazil, Japan, Egypt<ref name="mkegypt"/> and Finland to promote the Soviet Union's accomplishment of putting the first human in space. He visited the United Kingdom three months after the Vostok 1 mission, going to [[London]] and [[Manchester]].<ref name="wcml" /><ref name="French1998" />
The sudden rise to fame took its toll on Gagarin. While acquaintances say Gagarin had been a "sensible drinker", his touring schedule placed him in social situations where he was always expected to drink. Gagarin was also reportedly caught by his wife in a room with another woman, a nurse named Anna who had aided him after a boating incident earlier in the day, at a Black Sea resort in September 1961. He attempted to escape by leaving through a window and jumping off her second floor balcony, hitting his face on a [[curb|kerbstone]] and leaving a permanent scar above his left eyebrow.<ref name="indep20110403"/><ref name="bbc20110404"/>
In 1962, he began serving as a deputy to the [[ Supreme Soviet of the Soviet Union]] and was elected to the Central Committee of the [[Komsomol| Young Communist League]]. He later returned to [[Star City, Russia|Star City]], the cosmonaut facility, where he spent seven years working on designs for a reusable spacecraft. He became a [[Podpolkovnik| Lieutenant Colonel]] of the [[ Soviet Air Forces]] on 12 June 1962, and received the rank of [[Polkovnik| Colonel]] on 6 November 1963. <ref name="astro" /> Soviet officials tried to keep him away from any flights, being worried of losing their hero in an accident. Gagarin was backup pilot for his friend [[Vladimir Komarov]] in the [[Soyuz 1]] flight, which was launched despite Gagarin' s protests that additional safety precautions were necessary. <ref name="krulwich2011"/> When Komarov's flight ended in a fatal crash, Gagarin was permanently banned from training for and participating in further spaceflights.
Gagarin had become deputy training director of the [[Star City, Russia|Star City]] cosmonaut training base. At the same time, he began to re-qualify as a [[fighter pilot]].
On 27 March 1968, while on a routine training flight from [[Chkalovsky Airport|Chkalovsky Air Base]], he and flight instructor [[Vladimir Seryogin]] died in a [[Mikoyan-Gurevich MiG-15|MiG-15UTI]] crash near the town of [[Kirzhach]]. The bodies of Gagarin and Seryogin were cremated and the ashes were buried in the [[Kremlin Wall Necropolis|walls of the Kremlin]] on [[Red Square]].
Gagarin was survived by his wife Valentina, and daughters Yelena and Galina. Yelena Yurievna Gagarina, Yuri's elder daughter, is an art historian who has worked as the [[director-general]] of the [[Moscow Kremlin]] Museums since 2001.<ref name="airspace20110501" /><ref name="euronews20110412" /> His younger daughter, Galina Yurievna Gagarina, is department chair and a professor of economics at [[Plekhanov Russian University of Economics]] in Moscow.<ref name="airspace20110501" /><ref name="rea20110411" />
===Cause of jet crash===