Dr. Leopold enjoys seeing puny humans gather things around them in a compulsive manner.
That is why he has decided to release trading cards for the game. With those you will be able to expand your scientific knowledge of the solar system by knowing the latin name of the space whales and living planetoids.
Truly now Leopold's genius is incontestable.
(They're cards, that you gather on Steam, you get the point... but don't tell Leopold.)