Include the number of turns since info is updated on old information.
I see information on planets that is completely wrong, which is fine except that it is presented to me by the game as fact. If it is information that my allies collected I don't even have any way of knowing how old the info is or what changes have taken place since it was gathered. Yet the game presents the info in the same manner as that which I gathered this turn, rather than having any indication that it is based upon old or imperfect data.
Similarly, I have given ships to players whom I have intel-sharing with. The game tells me that the cargo is the same as the turn I gave it, but I know that info to be false.
Simply include the number of turns since the info was gathered for planets and ships.
"current"
"1 turn ago"
"2 turns ago"
"3 turns ago"
...etc.