Word: interstellar
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GIANT SPACE STATIONS IN THE SKY, underground cities on the moon, galactic empires that have forgotten the earth, interstellar war with telepathic ants, voyages to go boldly where no man has gone before. Such were the predictions about the glories of the space age. No wonder the failure of events to live up to the predetermined history bequeathed by science fiction has disappointed the baby boomers...
...part of the theory, however, still seems valid. It holds that as additional gas falls into the black hole, it is compressed and heated. This process creates positrons, one form of the strange stuff known as antimatter; as the positrons are flung out into space, they eventually collide with interstellar clouds. Result: enormous explosions...
Every subatomic particle has a corresponding antiparticle, identical in mass but differing in one crucial characteristic, like electric charge. Positrons, which carry a positive charge, are the antiparticles of electrons, which are negative. Matter and antimatter destroy each other whenever they meet, and because interstellar clouds are full of electrons, these particular collisions have been fingered as the power behind the Great Annihilator...
...they existed, they'd be here," he "Interstellar travel isn't that hard...
...visit Earth with relative. He says that NASA had a conference about 10 ago that asserted that the development of self-replicating robots may only be 50 years in the future. These machines would use materials from foreign solar systems to "reproduce," and would thus remove barriers presented by interstellar distances...