Newly Discovered Exoplanet Has Longest Known Year

Astronomers from the Harvard-Smithsonian Center for Astrophysics have found an exoplanet with the longest year using data taken from the NASA Kepler spacecraft. The exoplanet, known as Kepler-421b, orbits its star about one thousand light years away from Earth every 704 days, at an estimated distance of 110 million miles away from the host star.