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by Jeff Patterson on 01/07/13Centauri Dreams considers artifacts future and past. The Milky Way has 17 billion Earth-sized planets and a whole mess of exocomets. Here's the science of choosing space pioneers.
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Centauri Dreams considers artifacts future and past. The Milky Way has 17 billion Earth-sized planets and a whole mess of exocomets. Here's the science of choosing space pioneers.