To yika planeti yi ni sistemu oruka planeti ati ayikagberigberin alagbara.. 
jẹ aṣe-oko-okowo to gba ebun Nobel ninu Oro-Ìtọ́kasí.Awon Ọjọ́ìbí niawon ẹlẹ́bùn ninu oro-awon yanranti ara Amerika ara Amerika.. 