Kuringana na uugi wa athomi a science a tene, ni mekire uthuthuria na magiuka kumenya ati thi ikoragwo i ya githiururi, haria uthuthuria makiria ni mamenyire ati ni kuri gatagati wa thi na oho nikuri raini iria ikoragwo igayanitie thi maita meri niyo equator.