In thermodynamic terms, temperature is a function of heat energy in a given amount of matter, and space by definition has no mass. One common misconception is that outer space is cold, but in truth, space itself has no temperature. Acute exposure to the vacuum of space: No, you won’t freeze (or explode) Meanwhile, many of these same films conveniently ignore the slightly more subtle, yet highly relevant hazards of prolonged spaceflight even in an enclosed vessel at normal atmospheric pressure. Outer space is often depicted in film as a cold, inhospitable place, where exposure to the perpetual vacuum will make your blood boil and your body burst alternatively, if neither of those things happen, you’re bound to instantly freeze into a human-popsicle. Today, as technology becomes more capable of enabling manned travel to Mars and Hollywood’s imagination runs wild with notions of humanity’s spaceflight-steeped future (with recent blockbusters like Star Trek, Prometheus, Star Wars, and even Wall-E), many fallacies about space have emerged. Since the first two-hour excursion into space by Yuri Gagarin in 1961, the lure of manned space travel has proved irresistible to scientists, entrepreneurs, and entertainers alike.
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