Exoplanet Kepler-88 d is 3X more massive than Jupiter
Description
Six years of W. M. Keck Observatory observations of the Kepler-88 system has revealed massive exoplanet Kepler-88 d.
Credit: Space.com / animation: W.M. Keck Observatory/Adam Makarenko / produced & edited by [Steve Spaleta](http://www.twitter.com/stevespaleta)
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