Astronomers discover 7 Earth-sized planets, say alien life may be sustainable

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New wonders are being discovered everyday - even outside our atmosphere.

On Wednesday afternoon, astronomers announced the discovery of an "exoplanet" solar system circling around an "ultracool" dwarf star called "Trappest-1".

That sun is much smaller than ours and the plaents are much closer together than ours, but scientists say there's a chance that alien life could be sustained on several of those planets.

Researchers will now study the atmosphere of each one and determine if they have liquid water on their surfaces.

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