No Man's Sky Progression system - is there any?

I wonder if No Man’s Sky has a progression system of some sort, other than upgrading your weapons, armor and ship - is there anything more to it?

@Besjanad, from what I’ve heard, as you progress more towards the center of the universe, you’ll get to see more interesting creatures and environments. This will certainly push players to move on forward to see what lies ahead. I think that this was mentioned in the No Man’s Sky design video, you can check it out on YouTube. So although many people think that people will get board after seeing 5 planets and everything will be the same, it seems that it might get even more interesting and people will want to continue on finding more exciting worlds, artifacts, resources, NPCs, structures, etc.