Kunini lapho into ibhekwa khona njengeplanethi?
Ukuze kubhekwe njengeplanethi into kufanele ibe nomzila ozungeza ilanga, ibe nesisindo esanele sokwakha ukuma okuyisiyingi, futhi kufanele ibe amandla adonsela phansi aphambili endaweni engenazo ezinye izinto ezinobukhulu obufanayo ezingazungezi into okukhulunywa ngayo.