Chinese Space Walk
– “For You To Enjoy And Share With Friends” –
Space walks are another part of the learning curve that you must go through if you are serious about space travel and construction in space. Space walks or Extra-Vehicular Activities (EVAs) may be tethered or untethered. When tethered the astronaut is connected to the ship by an umbilical cord which supplies oxygen and electrical power and of course no propulsion is required to travel back to the ship. There have only been 4 missions where untethered space walks have taken place and these were carried out with a device called the Manned Manoevering Unit. Here we see tethered Chinese astronauts gaining EVA experience. The Chinese have very ambitious plans for a large Earth orbiting space station and it will be necessary for many space walks to take place during construction.
The Soviets had stunned the USA by launching the first satellite and putting the first man in space. They again stunned the USA with the first ever EVA (space walk) performed by Alexey Leonov from the Voskhod 2 spacecraft 0n March 18th 1965. His EVA lasted for 12 minutes and during that time he had no means to control his motion other than pulling on his 15.5m tether.