Chii chinonzi nyika duku?
Muna August 2006, International Astronomical Union (IAU) yakatsanangura nyika duku sechinhu chokudenga chine: - rinotenderera Zuva, - ane uremu hwakakwana kuti atore chimiro chehydrostatic equilibrium (inenge yakatenderera), - haina "kuchenesa nharaunda" yakapoteredza nzvimbo yayo, - haisi setiraiti.