Newfound alien planet has longest year known for transiting world

July 24, 2014 6:44 AM

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Newfound alien planet has longest year known for transiting world

The Uranus-sized exoplanet Kepler-421b appears in this artist's illustration. The exoplanet orbits an orange, type K star, lying roughly 1,000 light-years from Earth.David A. Aguilar (CfA)

The alien planet Kepler-421b — which crosses the face of, or transits, its host star from Earth's perspective — takes 704 Earth days to complete one orbit, and thus has the longest year known for any transiting alien world, researchers said. (For comparison, Earth orbits the sun once every 365 days,...

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