Comments by "Lawrence D’Oliveiro" (@lawrencedoliveiro9104) on "" video.

  1. The OP is talking about how spaceships maneouvre in vacuum versus how aircraft fly in an atmosphere. The “Star Wars” fighters banked and turned like aircraft, not spaceships.
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  2. A diverse ecosystem is valuable. That’s why Linux supports something like two dozen different major processor architectures—more than any other OS in history. And it also supports a wide variety of filesystems, not just NTFS.
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  3. 9:11 There was one hardware difference between the CM AGC and the LM AGC: in the Command Module, there were two separate DSKYs. The second one was located in the space behind the main control panel, where the navigator stood while taking sightings through the telescope (and also I think where the crew had to go through to get to the docking hatch).
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  4. How did they get the dust to fall in parabolic arcs?
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  5. Actually, there are quite a few architectures in common use. Your wi-fi router is probably running a MIPS processor. SiFive is gathering momentum. And if you look at the world’s fastest supercomputers, you’ll see a few POWER machines near the top. What do these processors have in common? They all run Linux.
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  6.  @John.0z  Sorry, yes, I meant RISC-V. SiFive is just one of many companies embracing that architecture.
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  7. There was rather more than just 32 or 36. There were also 24-bit, 48-bit, and 60-bit machines, just to mention a few.
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  8.  @t65bx25  Not sure what that sequence is supposed to do. In my terminal: CTRL-A -- go to beginning of line CTRL-C -- send interrupt CTRL-V -- escape next control character What kind of OS do you think we would use?
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  9. They managed to decide on PowerPC CPUs for the Mars rovers.
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  10. Yup, “quantum” computers are reinventing the idea. They are great at solving physical simulations quickly, but to limited accuracy.
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  11. I wonder if Trump believes the Moon landings were real ...
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  12. Not counting the dozens, hundreds of engineers and their slide rules.
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  13.  @battleoid2411  The computers were there to aid the engineers, not the other way round.
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  14. He builds on the experience of those who pioneered it earlier.
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  15. The electronic innards were buried in a thick mass of epoxy precisely to resist shock and vibrations. That epoxy is now an obstacle to fixing salvaged units that don’t work.
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  16. So much careful design went into it. The two absolutely critical engines that, if they didn’t fire, the men would be left marooned in space or on the Moon—the Service Module and the LM Ascent stage—were hypergolic. That means their ignition only depended on simple on/off valves working properly, not on more complicated throttles, pumps etc. The initial trajectory to the Moon was “free return”, which meant that if nothing further was done, they would simply come back to Earth again. This is what happened with Apollo 13, where the main issue was figuring out how to last the time it took for the trip back.
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