Only a few decades after the first telescope was invented, a whole literature of space travel had emerged, mixing fiction with newly acquired astronomical knowledge (Man and Space 9-10). ... There is no doubt that the powers that are now coming into our hands will be enough to reshape this solar system like we have already reshaped the Earth (Man and Space 153). ... The immediate effects of a major impact, including firestorms, acid rain, and the destruction of ozone layer, coupled with the possible triggering of volcanism and seismic activity will cause a huge environmental disaster and ...

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