Krypton Rao “Boron is the smallest and innermost planet in the Rao System. Its orbital period around the Rao... Boron “Thalon is the third planet in the Rao System Thalon “Phalon is the second planet in the Rao System. Phalon “Haron is the fifth and outermost planet in the Rao System. Haron Pages in category "Rao System" The following 6 pages are in this category, out of 6 total. B BoronH HaronK KryptonP PhalonR RaoT Thalon Retrieved from "http://superman.wikia.com/wiki/Category:Rao_System"