Space suits | Wikipedia audio article
Channel: Subhajit Sahu
Date: 27/03/2019

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Space_suit


00:02:22 1 Requirements
00:04:10 1.1 Secondary requirements
00:06:57 1.2 Operating pressure
00:09:32 1.3 Physical effects of unprotected space exposure
00:12:12 2 Design concepts
00:15:22 2.1 Soft suits
00:15:45 2.2 Hard-shell suits
00:17:04 2.3 Hybrid suits
00:17:52 2.4 Skintight suits
00:19:03 3 Contributing technologies
00:19:49 3.1 Glove technology
00:21:03 3.2 Life support technology
00:21:51 3.3 Helmet technology
00:22:20 3.4 High-altitude suits
00:23:20 4 Models of historical significance
00:23:30 4.1 Soviet and Russian suit models
00:25:07 4.2 United States suit models
00:25:27 4.3 Chinese suit models
00:29:20 5 Emerging technologies
00:31:09 5.1 Additive manufacturing
00:31:29 5.2 Astronaut Glove Challenge
00:32:30 5.3 Aouda.X
00:33:06 5.4 Bio-Suit
00:34:31 5.5 Constellation Space Suit system
00:34:57 5.6 Final Frontier Design IVA Space Suit
00:35:48 5.7 I-Suit
00:37:09 5.8 Mark III
00:37:44 5.9 MX-2
00:38:35 5.10 North Dakota suit
00:39:59 5.11 PXS
00:41:25 5.12 SpaceX suit
00:41:53 5.13 Suitports
00:42:50 5.14 Z-series
00:43:48 6 In fiction
00:45:12 7 See also
00:46:17 8 References



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SUMMARY
=======
A space suit is a garment worn to keep a human alive in the harsh environment of outer space, vacuum and temperature extremes. Space suits are often worn inside spacecraft as a safety precaution in case of loss of cabin pressure, and are necessary for extravehicular activity (EVA), work done outside spacecraft. Space suits have been worn for such work in Earth orbit, on the surface of the Moon, and en route back to Earth from the Moon. Modern space suits augment the basic pressure garment with a complex system of equipment and environmental systems designed to keep the wearer comfortable, and to minimize the effort required to bend the limbs, resisting a soft pressure garment's natural tendency to stiffen against the vacuum. A self-contained oxygen supply and environmental control system is frequently employed to allow complete freedom of movement, independent of the spacecraft.
Three types of space suits exist for different purposes: IVA (intravehicular activity), EVA (extravehicular activity), and IEVA (intra/extravehicular activity). IVA suits are meant to be worn inside a pressurized spacecraft, and are therefore lighter and more comfortable. IEVA suits are meant for use inside and outside the spacecraft, such as the Gemini G4C suit. They include more protection from the harsh conditions of space, such as protection from micrometeorites and extreme temperature change. EVA suits, such as the EMU, are used outside spacecraft, for either planetary exploration or spacewalks. They must protect the wearer against all conditions of space, as well as provide mobility and functionality.Some of these requirements also apply to pressure suits worn for other specialized tasks, such as high-altitude reconnaissance flight. At altitudes above the Armstrong limit, around 19,000 m (62,000 ft), water boils at body temperature and pressurized suits are needed.
The first full-pressure suits for use at extreme altitudes were designed by individual inventors as early as the 1930s. The first space suit worn by a human in space was the Soviet SK-1 suit worn by Yuri Gagarin in 1961.