Duba wurin da ke ƙasa sannan ka amsa tambayar daga baya a cikin harshe ɗaya kamar yadda wurin yake:  Hanyar wucewa: Gudun hijirar duniya yana faruwa lokacin da duniya ko wata tauraron dan adam ta tauraron dan adam ta yi mu'amala da faifan iskar gas ko planetesimals, wanda hakan ke haifar da sauye-sauye na tauraron dan adam na tauraron dan adam, musamman ma rabin-babban axis. Hijirar duniya ita ce mafi kusantar bayani game da Jupiters masu zafi: exoplanets tare da Jovian masses amma orbits na 'yan kwanaki kawai. Ka'idar da aka yarda da ita gabaɗaya game da samuwar taurari daga faifan protoplanetary ya yi hasashen irin waɗannan taurari ba za su iya kasancewa kusa da taurarin su ba, saboda babu isasshen taro a irin waɗannan ƙananan radii kuma yanayin zafi ya yi yawa don ba da izinin samuwar duwatsu ko kankara.  Tambaya: Menene ake kira lokacin da wata duniya ko wani abu ya motsa daga hanyarsa ta al'ada?
Gudun Hijira na Duniya