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<h2 class="hd hd-2 unit-title">Space Suit Requirements, Part 1</h2>
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<h2>6.2.1 Space Suit Requirements, Part 1</h2>
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<p><img style="display: block; margin: 20px auto 20px auto;" src="/assets/courseware/v1/e79bb275363758f659d05b1f99892003/asset-v1:MITx+16.00x+2T2019+type@asset+block/STS-118_EVA_EMU_Suit.jpg" alt="Astronaut Rick Mastracchio wearing the Extravehicular Mobility Unit during an EVA on STS-118" type="saveimage" target="[object Object]" /></p>
<p style="text-align: center;"><em><span style="font-family: 'Open Sans', Verdana, Arial, Helvetica, sans-serif;">Astronaut Rick Mastracchio wearing the Extravehicular Mobility Unit during an EVA on STS-118 (Image credit: NASA)</span></em></p>
<p>In popular culture, astronauts are almost always depicted wearing gas-pressurized EVA space suits, even though in reality they spend the majority of their time in space inside a spacecraft, where space suits are not required. This impression goes to highlight the critical importance of space suits to EVA and to human spaceflight in general. A space suit is effectively a portable miniature spacecraft, and has many of the same ECLSS requirements that we discussed in Unit 3. In the following video, Prof. Hoffman explains what is required in the design of a space suit and describes the various components of the NASA Extravehicular Mobility Unit (EMU) suit.</p>
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<h2 class="hd hd-2 unit-title">Space Suit Requirements, Part 2</h2>
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<h2>6.2.2 Space Suit Requirements, Part 2</h2>
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<p>In addition to supplying oxygen, removing carbon dioxide, and maintaining pressure, a space suit must also provide an environment that is comfortable and conducive to work. In the next video, Prof. Hoffman explains how space suits are also designed to provide thermal control, food and water, and means of communication. These considerations are critical for working in the hostile environment of space, where missions can be long and temperatures can fluctuate between 120 degrees C during the daytime and -155 degrees C at night. We conclude the discussion with a closer look at the different layers of material that make up a space suit.</p>
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<h2>6.2.3 Additional Resources</h2>
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Identify the basic requirements for humans to stay alive in a space suit" type="button" id="LD">MO 6.1</button></p>
<ul>
<li><a href="http://www.nasa.gov/suitup">Suit Up: Commemorating 50 Years of Spacewalking (NASA)</a></li>
<li><a href="http://news.nationalgeographic.com/news/2011/05/pictures/110505-alan-shepard-50th-anniversary-us-spaceflight-nasa-science/">Space Suit Evolution Since First NASA Flight (National Geographic)</a></li>
<li><a href="http://www.nasa.gov/audience/foreducators/spacesuits/historygallery/" target="[object Object]">Spacesuit and Spacewalk History Image Gallery (NASA)</a></li>
<li><a href="http://www.popularmechanics.com/space/rockets/g1317/step-inside-the-russian-spacesuit-factory/" target="[object Object]">Step Inside the Russian Spacesuit Factory (Popular Mechanics)</a></li>
<li><a href="http://www.nasa.gov/audience/foreducators/spacesuits/home/clickable_suit_nf.html" target="[object Object]">Extravehicular Mobility Unit Gallery (NASA)</a></li>
<li><a href="http://newsoffice.mit.edu/2014/second-skin-spacesuits-0918" target="[object Object]">BioSuit<sup>TM</sup>: Space Suit of the Future? (MIT)</a></li>
</ul>
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