This is a really cool take on the theme with a lot of replay value! I love that each planet has it's own abilities and you clearly spent a good amount of time on the writing!
One piece of criticism I have is I actually didn't expect this to be a card game from the planet select screen! For have great trivia blurbs about each planet and a one sentence summery of what they do, but it'd be really great if the player can see exactly what cards each planet has when they are selecting them.
This is a cool complex game and I'd love to see more!