Wannan duniyar tana da sunan GJ 504b yana da ruwan hoda mai ruwan hoda. Ya yi kama da Jupiter, watau babbar tabar fata a cikin tsarin duniyar yanar gizonku. Amma GJ 504b shine sau hudu mafi girma. A 460 digiri Fahrenheit, yana da zazzabi na tanda mai zafi, kuma shine zafin zafin da yake haifar da haske.