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Saturday 17 March 2018

Space suit

A spacesuit is an article of protective clothing worn by astronauts to keep them alive in the harsh environment of outer space, vacuum and temperature extremes.

Spacesuits have their own heating and cooling systems and a radio communication system.

George Griffith's novel A Honeymoon in Space, published in 1901, is notable for potentially featuring the earliest depiction of space suits in fiction. The book explores the concept of space travel and portrays characters equipped with suits designed specifically for venturing into the void of space. This imaginative representation of space suits in Griffith's work showcases his forward-thinking vision and contributes to the rich history of speculative literature.

Spanish military engineer and physicist Emilio Herrera Linares designed and built a full-pressure suit "escafandra estratonĂ¡utica" in 1935, which was to have been used in a stratospheric balloon flight planned for early 1936.

Space suit designed by military engineer Emilio Herrera Linares for stratospheric balloon

The first space suit worn by a human in space was the Soviet SK-1 suit worn by Yuri Gagarin in 1961.

The first multi-person space flight, the Soviet Voskhod 1 mission in 1964, was also the first without spacesuits.

The spacesuits used by the Apollo 11 astronauts were known as the A7L; they had an attached primary life-support system and weighed about 81kg (equivalent to 13.6 kg in the moon's reduced gravity.

The torso of each Apollo space suit was custom-fitted with complex joints at the shoulders, elbows, wrists, hips, knees and ankles. Entry to the suit was through a rear pressure-sealing zip which ran from the upper back down to the crotch.

Apollo A7L space suit worn by astronaut Buzz Aldrin on Apollo 11

The Apollo space suit was made from 25 layers of protective materials ranging from Teflon cloth on the outside, through Beta cloth, aluminised kapton, mylar, Dacron, nylon, neoprene, nomex, spandex and cotton.

These space suits helped protect the astronauts against micro-meteorites and temperatures ranging from minus 150c to 120c.

The experience gained from developing NASA spacesuits was applied in the process of designing clothing for use in other professions. Firefighters now have lighter, less bulky breathing apparatuses and special "fireblocking" materials that are more resistant to cracking and burning. Spacers used for ventilation and cushioning in moon boots were adapted for use in athletic shoes that are designed to reduce fatigue and injury.

A standard flight-rated NASA space suit takes 5,000 hours to make and costs around US$12,000,000.

Orlan space suit, worn by astronaut Michael Fincke outside the ISS

NASA spacesuits are called Extravehicular Mobility Units.

18 suits were developed for the Space Shuttle program in 1974 and have vastly overworked their original 15-year-life design. NASA haven't built any since then and have been reusing the same suits for 50 years,; they currently only have 4 in operation.

Astronauts use white space suits in space as white reflects the solar radiation. However, while heading to space or coming back, they wear an orange space suit so that, if there's a malfunction and astronauts have to abandon ship, they are easy to spot for rescue crews.

 'International Orange' is the specific shade of orange used for NASA spacesuits. Both the Tokyo Tower and the Golden Gate Bridge are the same shade.

Source Compton's Encyclopedia, Daily Mail

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