Michael Collins, Apollo 11 astronaut, has died
Collins' role in Apollo 11 is often minimized in the public conciseness, but I find it particularly fascinating from a human perspective.  In certain ways it seems even scarier than Armstrong's and Aldrin's jobs.  They at least had more direct control over their success in landing on the moon.  Collins was largely powerless to help if something went wrong.  If that did happen, he would have been faced with the choice of abandoning his crewmates to die on the moon and fly back to Earth himself.  Meanwhile no one had ever been as far from other life as he was on that flight.  When he was on the far side of the moon he was truly alone in a way that no other person had ever been in human history.