Siddiqi, p.276; neither Siddiqi, nor Hall and Shayler claim that music was actually played after this request. Sergei Korolev was very nervous in the lead up to the launch; he experienced chest pains, and took a pill to calm his heart.Siddiqi describes is as a "tranquilizer pill", while Hall and Shayler describe it as a "cardiac pill". Gagarin, on the other hand, was described as calm; about half an hour before launch his pulse was recorded at 64 beats per minute.Siddiqi, p.276 ပစ်လွှတ်ခြင်း 06:07 UT Launch occurs from the Baikonur Cosmodrome Site No.1. Korolev radioed, "Preliminary stage..... intermediate..... main..... LIFT OFF! We wish you a good flight. Everything is all right." Gagarin replied, " (Here we go!)."Hall and Shayler, p.150 06:09 UT Two minutes into the flight and the four strap-on booster sections of the Vostok rocket have used up the last of their propellant; they shut down and drop away from the core vehicle. (T+ 119 s) 06:10 UT The payload shroud covering Vostok 1 is released. This uncovers the window at Gagarin's feet with the optical orientation device (lit. "look" or "glance"). (T+ 156 s) 06:12 UT Five minutes into the flight and the Vostok rocket core stage has used up its propellant, shuts down and falls away from the Vostok spacecraft and final rocket stage. The final rocket stage ignites to continue the journey to orbit. (T+ 300 s) 06:13 UT The rocket is still firing, pushing Vostok 1 toward orbit. Gagarin reports, "...the flight is continuing well. I can see the Earth. The visibility is good.... I almost see everything. There's a certain amount of space under cumulus cloud cover. I continue the flight, everything is good." 06:14 UT The rocket continues to fire, starting to pass over central Russia. Gagarin reports, "Everything is working very well. All systems are working. Let's keep going!" 06:15 UT Three minutes into the burn of the final rocket stage and Gagarin reports, ", I can't hear you very well. I feel fine. I'm in good spirits. I'm continuing the flight..." Vostok 1 is moving further downrange from the Baikonur Cosmodrome. He is reporting back to (the Baikonur ground station) and must be starting to move out of radio range of that station. Time in orbit Ground controllers did not know if a stable orbit had been achieved until 25 minutes after launch. 06:17 UT The Vostok rocket final stage shuts down, ten seconds later the spacecraft separates and Vostok 1 reaches orbit. (T+ 676 s) Gagarin reports, "The craft is operating normally. I can see Earth in the view port of the . Everything is proceeding as planned". Vostok 1 passes over Soviet Union and moves on over Siberia. 285px|ဗော့စတော့ ၁ ၏အထိန်းခုံအစိတ်အပိုင်း 06:21 UT တွင် ဗော့စတော့ ၁ သည် ကမ်ချက်ကားကျွန်းဆွယ်(Kamchatka peninsula)ပေါ်ဖြတ်ကျော်သွားပြီး and out over the North Pacific Ocean. Gagarin radios, "...the lights are on on the descent mode monitor. I'm feeling fine, and I'm in good spirits. Cockpit parameters: pressure 1; humidity 65; temperature 20; pressure in the compartment 1; first automatic 155; second automatic 155; pressure in the retro-rocket system 320 atmospheres...." 06:25 UT As Vostok 1 begins its diagonal crossing of the Pacific Ocean from Kamchatka peninsula to the southern tip of South America, Gagarin asks, "What can you tell me about the flight? What can you tell me?". He is requesting information about his orbital parameters. The ground station at Khabarovsk reports back, "There are no instructions from No. 20 (Sergey Korolyov), and the flight is proceeding normally" They are telling Gagarin that they don't have his orbital parameters yet because the spacecraft has been in orbit for only 6 minutes, but the spacecraft systems are performing well. 06:31 UT Gagarin transmits to the Khabarovsk ground station, "I feel splendid, very well, very well, very well. Give me some results on the flight!". Vostok 1 is nearing the VHF radio horizon for Khabarovsk and they respond, "Repeat. I can't hear you very well". Gagarin transmits again, "I feel very good. Give me your data on the flight!" Vostok 1 passes out of VHF range of the Khabarovsk ground station and contact is lost. 06:37 UT Vostok 1 continues on its journey as the Sun sets over the North Pacific. Gagarin crosses into night, northwest of the Hawaiian Islands. Out of VHF range with ground stations, communications must now take place via HF radio. 06:46 UT Khabarovsk ground station sends the message "KK" via telegraph (on HF radio to Vostok 1). This message means, "Report the monitoring of commands." They were asking Gagarin to report when the spacecraft automated descent system had received its instructions from the ground control. Gagarin reported back at 06:48 UT. 06:48 UT Vostok 1 crosses the equator at about 170° West, traveling in a south east direction and begins crossing the South Pacific. Gagarin transmits over HF radio, "I am transmitting the regular report message: 9 hours 48 minutes (Moscow Time), the flight is proceeding successfully. Spusk-1 is operating normally. The mobile index of the descent mode monitor is moving. Pressure in the cockpit is 1; humidity 65; temperature 20; pressure in the compartment 1.2 ... Manual 150; First automatic 155; second automatic 155; retro rocket system tanks 320 atmospheres. I feel fine...." 06:49 UT Gagarin reports he is on the night side of the Earth. 06:51 UT Gagarin reports the sun-seeking attitude control system has been switched on. The sun-seeking attitude control system is used to orient Vostok 1 for retrofire. The automated orientation system consisted of two redundant systems: an automatic/solar orientation system and a manual/visual orientation system. Either system could operate the two redundant cold nitrogen gas thruster systems, each with of gas. 06:53 UT The Khabarovsk ground station sends Gagarin the following message via HF radio, "By order of No.33 (General Nikolai Kamanin) the transmitters have been switched on, and we are transmitting this: the flight is proceeding as planned and the orbit is as calculated." They tell Gagarin that Vostok 1 is in a stable orbit. He acknowledges the message. 06:57 UT Vostok 1 is over the South Pacific between New Zealand and Chile when Gagarin sends this message, "...I'm continuing the flight, and I'm over America. I transmitted the telegraph signal "ON". 07:00 UT Vostok 1 crosses the Strait of Magellan at the tip of South America. News of the Vostok 1 mission is broadcast on Radio Moscow.BBC ON THIS DAY | 12 | 1961: Soviets win space race 375px|Path of Gagarin's complete orbit; the landing point is west of the takeoff point because of the eastward rotation of the Earth. 07:04 UT Gagarin sends spacecraft status message, similar to the one sent at 06:48. The message is not received by ground stations. 07:09 UT Gagarin sends spacecraft status message, the message is not received by ground stations. 07:10 UT Passing over the South Atlantic, the Sun rises and Vostok 1 is in daylight again. Vostok 1 is 15 minutes from retrofire. 07:13 UT Gagarin sends spacecraft status message, similar to the one sent at 06:48. Moscow picks up this partial message from Gagarin, "I read you well. The flight is going...." 07:18 UT Gagarin sends spacecraft status message, the message is not received by ground stations. 07:23 UT Gagarin sends spacecraft status message, the message is not received by ground stations. The automatic system brought Vostok 1 into alignment for retrofire about 1-hour into the flight. ပြန်ဝင်လာခြင်းနှင့်ဆင်းသက်ခြင်း At 07:25 UT, the spacecraft's automatic systems brought it into the required attitude (orientation) for the reentry engine firing, and shortly afterwards, the engine firing occurred, also known as retrofire. This took place over the west coast of Africa, near Angola, about from the desired landing point. The liquid-fueled retrorockets fired for about 42 seconds. Ten seconds after retrofire, commands were sent to separate the Vostok service module from the reentry module (), but the Vostok equipment module unexpectedly remained attached to the reentry module by a bundle of wires. At around 07:35 UT, the two halves of the spacecraft begin reentry and went through strong gyrations as Vostok 1 neared Egypt. At this point the wires broke, the two modules separated, and the descent module settled into the proper reentry attitude. Gagarin telegraphed "Everything is OK" despite continuing gyrations; he later reported that he did not want to "make noise" as he had (correctly) reasoned that the gyrations did not endanger the mission (and were apparently caused by the spherical shape of the reentry module). As Gagarin continued his descent, he experienced about 8 g (Gagarin's own report states "over 10 g") during reentry but remained conscious. right|thumb|ဗော့စတော့ ၁ ထိပ်ဖူးအား RKK Energiya museumတွင်ပြသထားပုံ In case of reentry engine malfunction, the spacecraft was designed to descend within 10 days due to orbital decay. However, the actual orbit differed from the planned and would not have allowed descent until 20 days postlaunch while the life support system was designed to function for only 10 days. At 07:55 UT, when Vostok 1 was still 7 km from the ground, the hatch of the spacecraft was released, and two seconds later Gagarin was ejected. At altitude, the main parachute was deployed from the Vostok spacecraft. Two schoolgirls witnessed the Vostok landing and described the scene: "It was a huge ball, about two or three metres high. It fell, then it bounced and then it fell again. There was a huge hole where it hit the first time." ဂါဂါရင်၏လေထီးချက်ချင်းပွင့်သွားပြီးနောက် ၁၀ မိနစ်အကြာ နိုင်ငံတကာစံတော်ချိန် 08:05 တွင် ဂါဂါရင်မြေပြင်ဆင်းသက်နိုင်ခဲ့သည်။