Star Tau Ceti Has Two Planets in Habitable Zone

Scientists from U.S. and Britain have found four planets, slightly larger than Earth, orbiting a star visible with a naked eye. Using a technique so sensitive that it can measure tiny changes in the light emitted by stars, scientists at University of California Santa Cruz and the University of Hertfordshire detected the planets orbiting the star Tau Ceti, which is 12 light-years from Earth. Two of the planets orbit in the so-called habitable zone, meaning the surface water could possibly...

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