The sci-fi worlds of Star Wars and Star Trek have trained us to think there are rocky, solid planets orbiting far away stars that are so similar to Earth we could walk upright and breathe their atmosphere. In reality, scientists have yet to identify a single planet outside of our solar system that's comparable to the size and composition of Earth.
Until now, that is.
via The Verge - All Posts http://www.theverge.com/2013/10/30/5044096/exoplanet-kepler-78b-discovery
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