‘Next-door neighbor’: exoplanet discovered 21 light-years from Earth kit Posted on July 31, 2015 Posted in Aggregated No Comments Tagged with Hot News The planet weighs 4.5 times more than Earth, and has a fast three-day orbit around its star. Share this:Share Share on Facebook (Opens in new window) Facebook Share on Reddit (Opens in new window) Reddit Share on X (Opens in new window) X Share on LinkedIn (Opens in new window) LinkedIn Email a link to a friend (Opens in new window) Email