Mutsazanisi (equator) - iri zita rapiwa kutsanangura mutsetse unopangidza panosangana uso hweurungano nemutsendo une munzi wehuremu uye wakarurama neakiso yeurungano yacho. Kureva kuti mutsendo uyu wakaita mutwi neaksio uye kuti wakatakura munzi wehuremu (centre of mass) yeurungano yacho. Iri zita rinoshandiswazve pakutsangudza kuumbwa kweRinopasi, (Earth).