Solethium is a game focused on buying and collecting Solethium tokens (Solar system planets, their satellites and space stations).
Since the game is built around Ethereum blockchain smart contract, every Solethium object is one-of-a-kind, unique, can not be stolen from the owner and can not be destroyed. We say it is a cryptocollectible.
Every available Solethium Object is one smart contract token. There is, of course, only one Sun, one Earth, One Jupiter…
The only way how Solethium object can change ownership is if someone buys it from you – but they will have to pay the bigger price for it then you did, thus making you a profit!