Ukwezi kwa kera cyane muri sisitemu y’izuba?

Mubyukuri, callisto numubiri wonyine urenga km 1000 muri diameter mumirasire yizuba yerekanye ko nta bimenyetso byongeye kugaragara kuva ingaruka zayo. Hamwe nigihe kinini cyimyaka miliyari 4, callisto ifite ahantu hashaje muzuba. Language: Rwandi