You're going to spoil your players,
giving them a full list of everyone they've met.
But it's a great tool for yourself; there's nothing like having them stumble across someone they've previously met, particularly in wildly difference circumstances. That helps make the universe feel real to them.
BTW . . . The Dead Spacer?
On of my games had "The Dead Spaceman Grill and Bar" - a [literal] hole-in-the-wall establishment on Koenig's Rock, in the Bowman Belt. :)