Uyu mubumbe witwa GJ 504B igizwe na gaze yijimye. Irasa na Jupiter, umubumbe munini wa gaze muri sisitemu yacu. Ariko gj 504b ni inshuro enye nini cyane. Kuri dogere 460 Fahrenheit, ni ubushyuhe bwihati rishyushye, kandi nubushyuhe bukabije bwabumbe butera guca.