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50 Years Since First Moon Landing.

Discussion in 'off topic' started by Weekender, Jul 11, 2019.

  1. dweezil

    dweezil pfm Member

    it
    Reminded me of John Deere, they love unintelligible error codes.

    Almost more amazed seeing it now with a lifetime of awareness.
     
  2. richgilb

    richgilb Admonishtrator

    Every year the moon and earth drift nearly 4cm apart, this has been going on for 4.5 billion years.

    How many miles is that in total, please?
     
  3. JensenHealey

    JensenHealey pfm Member

    1125 Miles

    But can you really assume that it was 4cm for all of those years? My guess is that the distance will change over time and so the real answer will be different.
     
  4. Sue Pertwee-Tyr

    Sue Pertwee-Tyr pfm Member

    I make that 18,000 kilometres, or a little over 11,000 miles.

    Edit, I think I'm a factor of ten out, so 180,000 Km. Which seems more unlikely, given that the moon is only a bit more than twice that distance away now.
     
  5. Weekender

    Weekender pfm Member

  6. richgilb

    richgilb Admonishtrator

    We are doomed. Either the sun implodes or the moon legs it.
     
  7. richgilb

    richgilb Admonishtrator

    Lol, is that your final answer?
     
  8. Bob McC

    Bob McC Living the life of Riley

    112,500 miles
     
  9. richgilb

    richgilb Admonishtrator

    Still quite a long way....
     
  10. Sue Pertwee-Tyr

    Sue Pertwee-Tyr pfm Member

    :D What’s yours?
     
  11. richgilb

    richgilb Admonishtrator

    I can see there are some proper mathematicians on pfm :rolleyes:
     
    Linds likes this.
  12. richgilb

    richgilb Admonishtrator

    40,825,084 miles, sadly. I suspect I might have made a mistake somewhere.
     
  13. jackbarron

    jackbarron Chelsea, London

    Watched the Apollo 11 documentary a week or two ago and will catch up with the BBC programmes this week. Neil Armstrong, Michael Collins and Buzz Aldrin, were definitely brave men.

    Jack
     
    MikeMA likes this.
  14. Jim Audiomisc

    Jim Audiomisc pfm Member

    I'm not sure but I think the rate of increase was larger when the Moon was closer as it is down to 'tidal' effects. I think this was discussed on the recent 'Planets' BBC series, but I can't recall any of the numbers beyond the ocean tides being *enormous* in the early era once the oceans had formed.

    To know more I guess I'd have to re-read the SF books by Forward again. If you want gravity effects, he was the go-to author. 8-]
     
  15. Jim Audiomisc

    Jim Audiomisc pfm Member

    Yes. Particularly given what happened with the capsule fire earlier on and the sheer level of "no one has ever done this before" risk involved.
     
    jackbarron likes this.
  16. Bob McC

    Bob McC Living the life of Riley

    The capsule fire could not have happened again.
    After it they stopped using pure oxygen inside the capsule.
     
  17. Stemcor

    Stemcor I should be listening to music

    I’m with Gerard124 on this.

    It did take me back to 20th July 1969. I remember my parents letting me stay up to watch the landing then being sent to bed shortly afterwards then being woken up a couple of hours later to see Armstrong make that historic step.

    Been to Kennedy Space Centre 4 times and was still wide eyed in amazement on visit no 4. There’s something about Apollo / NASA that gets into your blood. I’ve lost count of the number of times I’ve revisited the first moon landing. I still get a bit twitchy about the lunar descent even though we all know it was successful !
     
    MikeMA likes this.
  18. Jim Audiomisc

    Jim Audiomisc pfm Member

    They stopped using it *because* the fire showed it was untenable. More to the point, if you listen to the BBC WS series it explains the fire prompted a radical rethink of the entire design, etc. The oxygen was just one of the factors that added up to the fire.

    But the basic point was that they were in a rush and doing pretty much everything for the first time. So *expected* to find serious flaws that were dangerous along the way. Hence the Apollo 13 'problem' later on.

    That fire wasn't the first predictable problem with the space program that lead to a death, either. And they all knew it was very risky, but did it anyway.
     
  19. Jim Audiomisc

    Jim Audiomisc pfm Member

    As has been said, you can't live in the cradle forever.
     
  20. Rockmeister

    Rockmeister pfm Member

    I can't believe this thread...you guys do know the whole thing was faked!?
    I know this for a FACT because I once met a californian with a grey beard and crazy eyes who had asked me to hide him...apparently the CIA were on his trail because he KNEW it was all a fake...he had been the cameraman!
    I doubt him then asking me for $10 for a meal had much to do with anything?
     

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