Ruby

Ruby is a planet found in the inner Andromeda Galaxy inhabited by 1 nation.
Its population is 72 billion because there were a world war and many people were killed and before the war it's population is 75 billion.
Ruby is currently in year 2018 on its own calendar (The Missesian Calendar) That follows a 5-month system on a year that lasts approximately 300 days. (On Earth the current year is 2018 AD)
Planet Ruby is a giant gas planet in the Aros System before. But in 1930, 10 Aros countries invented a terraform the machine to terraform the Planet Ruby. After 20 years of hard work, Ruby is finished terraformed. After this, the 10 countries on Aros send many people into Ruby and the population in the Planet Ruby become more. After this, all the colony of the Ruby was independent accept the Stellania, Hooke Island and Renver's colony didn't gain its independence. And shortly become an Autonomy Federation. And in the 2000 Ay, All the Countries and Colony on the Ruby Formed a Confederation, the Confederation of Ruby. After this, the Confederation work hard together and become a very strong country in the whole Aros System.