Space travel isn't easy. It's risky and involves quite a bit of preparation if the trip is going to last more than a few minutes or hours. But if humanity is really going to commit to space exploration, there are a few problems to solve. Life support systems are obviously going to need to protect our fragile bodies from radiation and the vacuum of space. On top of that, we also need to counteract the negative effects of microgravity on our health. Some people are thinking about these problems, but it's likely that we won't have solutions until at least 2030.
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