So, I'm thinking of what an analog version of "No Man's Sky" would be like.....
So, imagine you get a deck of Tarot-sized cards, with four to six empty boxes on each card, and a two stats, Time and Distance. Each card is a planet.
You are NEVER allowed to look at other cards in the deck except for the one face-up card that you can see.
A "turn" exists like this: Based on the top face-up card, look at the Time stat...set an alarm for that many hours from now. When that alarm goes off, look at the Distance of the front card. Draw that many cards from the front of the deck and place them at the back of the deck. The revealed card is the new planet you've landed on.
If all of the boxes are empty, you are the first person to discover it! You get to name it...write it's name on the card.
Select one of the empty boxes. Draw something in the box, or write something about the planet, or leave a message, or whatever. Use things previously left as inspiration.
If all of the boxes have been filled in, modify anything you want on the card. Scratch stuff out, add to a drawing, leave another message, add more details to a description of fauna on the planet, whatever.
Start your turn over and set a new alarm based on the Time setting of this planet.
Because these are cards, you can have a shared universe! If you meet up with someone who is also playing:
Both players put their top card aside ( the "planet" that they currently are on ).
Both players shuffle their decks, and face-down, randomly trade X amount of "planets" with the other player.
The both players put their current planet back on the tops of their decks.