1 00:00:00,120 --> 00:00:01,960 Speaker 1: This Day in History Class is a production of I 2 00:00:02,040 --> 00:00:07,160 Speaker 1: Heart Radio. Hi everyone, I'm Eaves and you're listening to 3 00:00:07,240 --> 00:00:10,559 Speaker 1: This Day in History Class, a podcast where we build 4 00:00:10,640 --> 00:00:12,719 Speaker 1: the time machine and all you have to do is 5 00:00:12,760 --> 00:00:25,759 Speaker 1: hop in. Today is March. The day was March eighteenth. Nineteen, 6 00:00:27,680 --> 00:00:31,479 Speaker 1: Soviet cosmonaut Alexei Leonov became the first person to go 7 00:00:31,520 --> 00:00:35,120 Speaker 1: on a space walk. A spacewalk is when an astronaut 8 00:00:35,159 --> 00:00:38,360 Speaker 1: leaves their spacecraft attached to a tether. It's also called 9 00:00:38,360 --> 00:00:41,840 Speaker 1: an e v A, which stands for extra vehicular activity. 10 00:00:42,400 --> 00:00:45,920 Speaker 1: Alexei Leonov served as a fighter pilot in the nineteen fifties. 11 00:00:46,280 --> 00:00:48,800 Speaker 1: By nineteen sixty he had been chosen as one of 12 00:00:48,800 --> 00:00:52,800 Speaker 1: the first twenty cosmonauts for the Soviet space program and 13 00:00:52,880 --> 00:00:56,520 Speaker 1: was training to take his first space flight. The Soviet 14 00:00:56,600 --> 00:00:59,680 Speaker 1: Union launched the first person into space When You're a 15 00:00:59,720 --> 00:01:02,320 Speaker 1: Good are In made an orbital flight in his boss 16 00:01:02,320 --> 00:01:07,160 Speaker 1: Stock one spacecraft in nineteen sixty one. The Soviet Voshad 17 00:01:07,240 --> 00:01:11,560 Speaker 1: program launched its first mission on October twelfth, nineteen sixty four. 18 00:01:12,480 --> 00:01:15,119 Speaker 1: Vos Haad one was the first to carry more than 19 00:01:15,240 --> 00:01:18,320 Speaker 1: one crew person into space. It was also the first 20 00:01:18,360 --> 00:01:21,800 Speaker 1: mission to carry an engineer and a physician into space. 21 00:01:23,000 --> 00:01:26,720 Speaker 1: Vose had two launched just months later on March eighteenth nine. 22 00:01:28,120 --> 00:01:32,840 Speaker 1: It carried two people, commander A. Pavil Billyayev and pilot 23 00:01:32,880 --> 00:01:37,480 Speaker 1: Alexei Leonov. It was Leonov's first space flight and bill 24 00:01:37,560 --> 00:01:42,360 Speaker 1: Yayev's first and only space flight. The Voshad three k 25 00:01:42,560 --> 00:01:46,520 Speaker 1: D spacecraft had an extendable airlock that allowed Leonov to 26 00:01:46,560 --> 00:01:49,520 Speaker 1: go out into space without having to evacuate the main 27 00:01:49,560 --> 00:01:52,760 Speaker 1: cabin air About an hour and a half after launch, 28 00:01:52,920 --> 00:01:56,720 Speaker 1: Billyayev opened the outer airlock and Leonov walked out into 29 00:01:56,720 --> 00:02:00,720 Speaker 1: space attached to a tether. His spacewalk lasted for about 30 00:02:00,760 --> 00:02:04,680 Speaker 1: twelve minutes. A camera mounted on the airlock recorded the spacewalk. 31 00:02:05,600 --> 00:02:09,239 Speaker 1: It was reported that Leonov's body temperature jumped about three 32 00:02:09,240 --> 00:02:12,679 Speaker 1: point two degrees fahrenheit or one point eight degrees celsius 33 00:02:12,680 --> 00:02:15,040 Speaker 1: in twenty minutes, and he was close to having a 34 00:02:15,080 --> 00:02:19,320 Speaker 1: heat stroke. His space suit was full of sweat. Though 35 00:02:19,360 --> 00:02:23,640 Speaker 1: the spacewalk went relatively smoothly, Leonov had difficulty re entering 36 00:02:23,680 --> 00:02:26,480 Speaker 1: the capsule. The pressure difference between the air and his 37 00:02:26,520 --> 00:02:30,320 Speaker 1: space suit and the vacuum space expanded and stiffened his 38 00:02:30,360 --> 00:02:33,200 Speaker 1: space suit that made it too big and hard to 39 00:02:33,240 --> 00:02:36,600 Speaker 1: fit back into the airlock, so Leonov opened a valve 40 00:02:36,639 --> 00:02:40,119 Speaker 1: to release oxygen and depressurized his suit. He was then 41 00:02:40,200 --> 00:02:43,120 Speaker 1: able to fit back into the spacecraft, but he did 42 00:02:43,240 --> 00:02:46,200 Speaker 1: start to feel some of the effects of decompression sickness, 43 00:02:46,760 --> 00:02:50,800 Speaker 1: namely the sensation of pins and needles. The crew hit 44 00:02:50,840 --> 00:02:54,280 Speaker 1: another snag when ejecting the inflatable airlock, which sent the 45 00:02:54,320 --> 00:02:58,000 Speaker 1: spacecraft into a spin. Oxygen levels also began to climb, 46 00:02:58,400 --> 00:03:01,720 Speaker 1: which came with the risk of explode Jean. On top 47 00:03:01,760 --> 00:03:05,480 Speaker 1: of this, the automatic guidance system for re entry malfunctioned. 48 00:03:05,880 --> 00:03:08,440 Speaker 1: They had to turn off the automatic landing program and 49 00:03:08,480 --> 00:03:13,000 Speaker 1: instead conduct re entry and landing manually. They ended up 50 00:03:13,040 --> 00:03:16,400 Speaker 1: off course and the orbital module did not separate from 51 00:03:16,400 --> 00:03:19,600 Speaker 1: the landing module. They landed in snow in a forest 52 00:03:19,680 --> 00:03:23,720 Speaker 1: in Siberia. The flight had lasted for twenty six hours. 53 00:03:24,880 --> 00:03:27,720 Speaker 1: After two days in the freezing forest, the cosmonauts were 54 00:03:27,760 --> 00:03:30,359 Speaker 1: able to ski to a pick up location, and they 55 00:03:30,360 --> 00:03:34,400 Speaker 1: eventually made it to their launch site at Viconor. Nearly 56 00:03:34,480 --> 00:03:38,480 Speaker 1: three months after leonov spacewalk, U s astronaut Ed White 57 00:03:38,520 --> 00:03:41,400 Speaker 1: took the second spacewalk ever, when he stepped outside of 58 00:03:41,440 --> 00:03:45,480 Speaker 1: Gemini four. I'm Eve Jeffcote and hopefully you know a 59 00:03:45,560 --> 00:03:49,240 Speaker 1: little more about history today than you did yesterday. 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