What if as we visit new planets, the navi-computer scans change based on what we've done there and what we've seen. Once we fix the thrusters and unlock the bridge where we can access the navigation computer, we should only see the most basic information about an unvisited planet, even less if we're not in the system. - Extra-solar long range scans can only provide size. - Scans of other planets within a solar system provide size, rotation and gravity for sure, and only occasionally provides a biome, but that might even be wrong! - Once you orbit a planet, the biome becomes clear, along with warnings like toxic atmosphere, extreme cold or radiation. - After you've beamed down and start exploring, the things you discover are updated to the computer: Sub-biomes, villages, large dungeons, monsters, colonies placed, teleporters placed, whether you've circled the planet, etc.
Some additional information would about the planets would be great too, like: "Last visited at ..." And some more space for bookmarks.
Well... if you can tell size, then so too can you tell gravity. That is kinda how physics works. Plus the range of gravity is tied to size so there is really little reason to withhold this information. Also, with planet types being tied to stars as well, we can already assume what kinds of planets will be around any given star. The only real variable being the satellites of those planets. Really, the main information Id like to be tracked is, have we been there, and what the main "dungeon" is so we can revisit places for gathering materials.
The mass of a planet determines it's gravity, not it's size. You would weigh the same on Venus as you would on Uranus. Maybe the readout could be modified with various tags so it only showed each of us what we wanted?
Well, yes, though size also relates to mass. But anyhoo. Point is, even with real tech, we can tell size and composition of planets in other systems, and yes, their relative gravity. So I would find it rather silly to have such information arbitrarily hidden in a game with an apparent technological level far superior to our own.