At my gliding club we had an instructor, Ian Barber, who was still flying (and instructing) when he was 92.
I think he was 88 or so when he conducted the test flight for my rating in the high performance "Janus" two seat fiberglass glider -- a model that was winning World Championships and setting records all through the 70s and that still today is a very attractive aircraft as it performs similarly to modern Duo Discus and DG1000 gliders which are simpler (no flaps) and in general a lot easier to fly than the Janus, but will cost you about five times more to buy (at least new).
There were a lot of pilots in the club (including instructors) who took one or two flights in the Janus and then refused to go near it, generally describing it as a "pig". But a small group of us didn't even bother to get our DG1000 ratings (well, at least I didn't) until the club eventually sold the Janus because 1) we loved it; 2) in skilled hands it performed better, especially at high speed, but also in very tight thermals; and 3) it was always free.
And Ian was still instructing in the Pig at around age 90.
Ian stopped fly solo (in his early 70s Cirrus) and with beginning students several years earlier. But if you were solo-rated (in anything) then you could fly with Ian (in anything).
Ian didn't go around the moon, but in 1960 he set the record for the longest duration model aircraft flight with a time of 9 hours 4 minutes. It stood as a World Record for five years. That was slope soaring (on the same hill we flew the Janus on together 35 years later) a model glider with radio control of just the rudder, via a carrier wave transmitter, a 1-valve (I think) receiver driving a relay to release a rubber band escapement with C - L - C - R - C sequence. Basically a free-flight model, but you could turn it. And if you got it right, you could make a left and a right pass along a few hundred meter long ridge with just four brief stabs at the transmitter button. And a lot of things are "right". You can fly directly over the ridge, or you can fly up to several hundred meters in front of it.
Ian stopped flying at 92, but kept popping in to the club probably every week until a few weeks before his death in 2007.