Found! 5 ancient alien planets nearly as old as the universe

January 28, 2015 1:22 PM

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Found! 5 ancient alien planets nearly as old as the universe

Five rocky alien worlds that are 80 percent as old as the universe itself have been discovered, suggesting that Earth-size planets have been a feature of the Milky Way galaxy almost since its beginning.

The newfound exoplanets circle Kepler-444, an 11.2-billion-year-old star about 25 percent smaller than the sun that lies 117 light-years from Earth. All of the worlds are Venus-size or smaller and are therefore rocky, though scientists know nothing else about their composition.

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