An yi tunanin cewa duniyar duniyar ta yi amfani da shi don kare tsarin da ke ciki daga hare-haren cometary. Duk da haka, kwanan nan na'urorin kwaikwayo na kwamfuta sun nuna cewa Jupiter ba ya haifar da raguwa mai yawa a cikin adadin comets da ke wucewa ta cikin Solar System, kamar yadda karfinta ya rushe su a cikin kusan sau da yawa kamar yadda yake haɗuwa ko fitar da su. Wannan batu ya kasance mai rikitarwa a tsakanin masana kimiyya, kamar yadda wasu suna tunanin cewa yana janye comets zuwa ga Duniya daga Kuiper belt yayin da wasu suna tunanin cewa Jupiter yana kare duniya daga Oort cloud. Jupiter yana da kusan sau 200 fiye da asteroid da ke kusa da Duniya.
Jupiter