The Physics Of Space Flight

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Manned space missions to other planets, and even interstellar travel, has been the subject of countless books, movies and television shows, beginning in 1865 with Jules Verne’s book “From the Earth to the Moon”, where a man named Impey Barbicane makes a cannon large enough to fire a hollow bullet to the moon, one of the first attempts to depict a feasible propulsion, and is still considered the most realistic theory before 1900s. But space flight is no longer fiction, as Yuri Gagarin proved in 1961, and the technology allowing these advances is now even closer than ever, as the first manned flight for mars is scheduled for 2030. However, there are still major limitations to these kinds of space flight, and we still have to solve these problems before we attempt to leave Earth’s orbit. The first is Propulsion, as the current rocket fuel is far too heavy, and costs too much, to use it for anything other than trips to the moon and back. Second, is communication, as the craft will need to retain communication with Earth, as the current system has too much of a delay. Third, are the detrimental effects of gravity on bone mass. Forth, is artificial hibernation, necessary for interstellar travel. Fifth, is the deadly radiation of outerspace. Lastly, are supplies like food, water, and air. All these problems need to be solved before attempting to ever leave Earth orbit and enter Space. Propulsion is a major limitation to space exploration, because of its expense and weight.
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