Apollo 11 - the Moon landing
Such a wonderful thing. From 1903 for the first powered flight, to 1969 to walking on the Moon. Crazy and awe-inspiring.
Although a later and longer mission, if you want to sink into this stuff for hours I have to recommend this:
Hit the ‘T-Minus 1M’ button on the top right. (Warning: You’ll lose hours in there having a good time if you loved Apollo and haven’t seen this before).
Also a shout out for the “Moon Machines” series. They’re all on utube and great.
For the software dweebs out there, like me, check out the Navigation Computer episode.
They invented a lot of the constructs I use every day.