- 问题详情:Lifemayhaveevolvedonatleastthreeplanetswithinanewlydiscoveredsolarsystem39lightyearsfromEarth.AstronomersattheNASAhavediscoverednolessthansevenroughlyEarth-sizedworldsorbitingadwarfstarinthesystem.Scientistshadpreviouslyidentifiedatinynumbero...
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