Izikulufu zamarola eplanethi ziyakwazi ukumelana nemithwalo ephakeme emile neguqukayo ngenxa yenani eliphezulu lamaphoyinti okuxhumana, nemithwalo emile efika izikhathi ezi-3 kunezikulufu zebhola kanye neminyaka yokuphila efika izikhathi ezingu-15 kunezikulufu zebhola.
Inombolo enkulu yamaphoyinti okuxhumana kanye nejiyomethri yamaphoyinti okuxhumana yenza izikulufu zeplanethi ziqine kakhulu futhi zimelane nokushaqeka kunezikulufu zebhola, kuyilapho zinikeza isivinini esiphezulu nokusheshisa okukhulu.
Izikulufu zamarola eplanethi zinentambo, ezinobubanzi obubanzi be-pitches, futhi izikulufi zamarola zeplanethi zingaklanywa ngomthofu omncane kunezikulufu zebhola.