Nasa discovers solar system that may support alien life

Seven Earth-like planets found orbiting 'ultracool dwarf star' star known as Trappist-1

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(Image credit: 2017 NASA)

Nasa has found seven Earth-sized planets in close orbit around a dwarf star 39 light years from us, with at least three of them lying within the so-called "habitable zone", which means they might be capable of sustaining water and possibly life.

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