SPUTNIK / SCIENCE PHOTO LIBRARY SPUTNIK / SCIENCE PHOTO LIBRARY
Centrifuge training at the Gagarin Cosmonauts Training Centre in Russia. The centrifuge simulates the forces experienced due to acceleration at launch so that the cosmonaut can be assessed for his ability to work in such environments. When Vostok 1, the first manned space rocket, took off, the acceleration produced a force on its cosmonaut of 5Gs, meaning that he felt five times as heavy as he would on Earth. This training centre is named after the first man to orbit the Earth, Yuri Gagarin. It opened in 1960.
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