Earth-Sized Planet Discovered In Galaxy Outside Our Solar System

Exoplanet: An artist's impression shows Gliese 581 e with its star in the distance

From The Daily Mail:

Scientists have discovered a planet close in size to Earth in a galaxy outside our solar system.

As many as 300 so-called exoplanets - or planets outside our solar system - have been discovered, but most are much larger than Earth.

Gliese 581 e is about twice the mass of our planet and orbits a star 20.5 light years away in the constellation Libra.

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