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The Human Problem In Space Exploration

367 words - 2 pages

Space is the most hostile environment we will ever explore. Even a single five-hour spacewalk requires months of training, and a vast technical backup to keep it safe. The astronauts and cosmonauts who live in space are there for only a few weeks or months; if we want to travel into deep space it could take years. First we'll have to find out just how long the human body can survive in a weightless environment. In zero gravity, four pints of body fluid rush from ...view middle of the document...

In space there's no physical sensation to let you know when you're upside down and astronauts have to rely on visual clues from their surroundings. A few hours after reaching orbit, one in three of all astronauts will experience space sickness - a feeling rather like carsickness. And weightless conditions lead to calcium being leached from the bones, and problems with the astronauts' immune systems.Trillions of rocky fragments - meteoroids - roam our Solar System at speeds of up to 150,000 miles an hour. A asteoroid no bigger than a grain of salt could piercea spaceship window. Protection from the extreme hazards of space is going to need some clever technology. Space is also full of lethal radiation - X-rays, gamma rays and the high-speed particles called cosmic rays.Down here on Earth we are protected by the atmosphere and by our planet's magnetic field, but in space long haul astronauts suffer gradual but irreversible radiationsickness unless they are carefully shielded. Commander Shepherd is confident the ISS will help us crack the problems "The ISS is going to answer a number of questions about long range exploration in space. A lot of things are going to be pioneered on the space station for future exploration

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