[daveslash]

I pondered to my wife "I wonder if we'll return to the moon before all those who have been have passed away?" Phrased another way: "Will there ever be a day (since the first landing) on which no living human has left the Earth?"

Here's the list. In this context, I use "leave the Earth" mean to mean having left the planet's gravity well, not the atmosphere only. And asterisk implies walked on the moon. The number in brackets is the Apollo Mission no.

  Frank Borman [8] 
  Jim Lovell [8,13]
  Bill Anders [8]
  Tom Stafford [10]
  Fred Haise [13]
  Buzz Aldrin* [11]
  David Scott*  [15]
  Charlie Duke* [16]
  Ken Mattingly [16]
  Harrison Schmitt* [17]