Saving planet/system configuration

Hello!
I searched for a similar topic and found only this https://forums.uberent.com/threads/idea-planet-save.50493/ which did not get much attention. If it's a silly question, well ignore it

Anyway, yesterday playing against the AI I landed on a quite interesting planet, where 70% of the surface was water, with some island, and a big block of land (pangea?!). Two moons in orbit. Just like Earth two billions years ago

At first I didn't like it, but I have to admit to have had quite a fun moving outside my comfort zone and trying new approaches and units that usually I never use.

I would like to play again on that system. How can I do it? There is a way to save a planet or its entire system for a rematch? So far I didn't figure it out.