... A Dangerous Sunrise on Gliese 876d . ... Gate to Nowhere ) Explanation: On planet Gliese 876d, sunrises might be dangerous. Although nobody really knows what conditions are like on this close-in planet orbiting variable red dwarf star Gliese 876 , the above artistic illustration gives one impression. ... Gliese 876d is imagined above showing significant volcanism , possibly caused by gravitational tides flexing and internally heating the planet, and possibly more volatile during the day. ...