Holy Roman Emperor
This is Mariner 10. It was the first probe to explore the planet Mercury - which it did WAY back in 1974.
Now you may ask, "Now Charlemagne, what in God's name does THIS have to do with sports?" The answer? Not a Goddamn thing. It's just that this little tidbit of information is still infinitely more useful and worth sharing than whatever the fuck Blackfoot tries doing in this forum.