"Last year, Elon Musk's personal Tesla might have gotten all the headlines during SpaceX's historic rocket launch back back in February, but the Falcon Heavy also carried a second, secret payload almost nobody knew about.
Stashed inside the midnight-cherry Roadster was a mysterious, small object designed to last for millions (perhaps billions) of years – even in extreme environments like space, or on the distant surfaces of far-flung planetary bodies.
Called an Arch (pronounced 'Ark'), this tiny storage device is built for long-term data archiving, holding libraries of information encoded on a small disc of quartz crystal, not much larger than a coin." sciencealert
So, this particular pilgrim is in solar orbit carrying with him a tiny device that contains the entire text of Isaac Asimov's great science fiction trilogy – "Foundation," "Foundation and Empire" and "Second Foundation." This is a wonderful, thought provoking work that I relished as a teenager. Asimov was a polymath genius; biologist, man of letters and theater critic among other things. I have a copy of his commentary on the entire oeuvre of Gilbert and Sullivan.
Musk is a man like unto him. pl