Chii chinonzi nyika?
Sangano reInternational Astronomical Union (IAU) rakatsanangura muna Nyamavhuvhu 2006, kuti nyika iri muSolar system muviri wedenga uyo: - rinotenderera Zuva (nyeredzi inotarisira yeSolar system), - ane uremu hwakakwana kuti atore chimiro chehydrostatic equilibrium (inenge yakatenderera), - rakakura zvakakwana zvokuti simba raro rinokweva rinobvisa zvimwe zvinhu zvose zvakaenzana kukura zviri pedyo nomugwagwa waro unotenderera Zuva.