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More space related pictures from Sept.

Discussion in 'Non-Vegas Chat' started by Joe, Oct 2, 2013.

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  1. Joe

    Joe VIP Whale

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  2. ken2v

    ken2v This Space For Rent

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    The moon landings were staged!

    Pretty wild way to see "us." And the really wild stuff way out there ...
     
  3. DeMoN2318

    DeMoN2318 The DERS

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    Probably something I should know...but I dont...how do they know how far away the images the Hubble takes are? 110 million light years? how do they know that
     
  4. Joe

    Joe VIP Whale

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    Uh, they figured it out on their slide rules.:evillaugh
    I have no clue.

    Just to date myself, I still have two slide rules laying around somewhere.
     
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  5. DeMoN2318

    DeMoN2318 The DERS

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    I have never even seen a slide rule...
     
  6. Joe

    Joe VIP Whale

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    Hard as it is to believe, the space program was built by engineers figuring out all those calculations on slide rules. No calculators back then.
    I'm a geek but this might interest you for 20 seconds at least.

    http://sliderulemuseum.com/SR_Course.htm
     
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  7. DeMoN2318

    DeMoN2318 The DERS

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    BOOKMARKED!!!

    Slide rules must have been crazy expensive being that they require so much precision to be accurate...
     
  8. Joe

    Joe VIP Whale

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    I don't remember that was 40+ years ago, but it was required for many of the math courses, so iirc since so many students needed them, there was competition and the prices were reasonable for the times.

    Lol, I think I paid $40 for my first basic, non scientific, calculator.
     
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  9. Turtleman

    Turtleman VIP Whale

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    I still have my trusty K&E slide rule. I was darn good using it too; almost so fast I caught it on fire a few times, and no batteries required!
     
  10. Joe

    Joe VIP Whale

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    I know mine are in a box of crap in the house somewhere, but I guarantee if I tried to use it today, I'd have no clue.

    Maybe I'll wait 10 more years and then put them on Ebay as antiques. :wink2:
     
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  11. Turtleman

    Turtleman VIP Whale

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    I changed "A&E" from my earlier post to "K&E". (Guess I've been watching too much "Breaking Bad!" Anyway, I just dug up my ancient slide rule in its original case that has a price sticker of $22. That was back in 1969!
     
  12. Joe

    Joe VIP Whale

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    Wow! An even bigger pack rat them me! :nworthy: The case and the price tag still intact!
     
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  13. KellyLovesVegas

    KellyLovesVegas certified personal trainer/retired space nerd

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  14. KellyLovesVegas

    KellyLovesVegas certified personal trainer/retired space nerd

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    I'm not surprised you haven't seen one. Aren't you in your 20s or 30s? I'm a 53 year old engineer and I never used them. When I was 7 or 8 years old, my Dad (also an engineer) showed me the slide rule and tried to explain to me how it worked. My young brain was more focused on Barbies at that time :). By college I used an HP programmable calculator - gotta love that RPN!
     
  15. Kickin

    Kickin Flea

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    I'm glad you asked this. For some reason I just thought it had to do with the Doppler effect and I started writing that until it hit me that would only work for measuring speed. So I looked it up and its pretty fascinating. Here's a good easy to understand summary:

    http://earthguide.ucsd.edu/virtualmuseum/ita/06_3.shtml

    Basically its based on the magnitude of the star's brightness relative to a fixed standard. They can calculate what its absolute brightness is from its color spectrum. From there they can calculate how far away it would have to be for it to have "dimmed" to its level of apparent brightness that we see from earth. That's the gist of it, but there are other methods too.
     
  16. Kickin

    Kickin Flea

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    LOL such a nerd. I still use my 12C pretty often and have always kept it on RPN. I used to have trouble sometimes using normal algebraic mode on my iphone until I got used to it again.
     
  17. KellyLovesVegas

    KellyLovesVegas certified personal trainer/retired space nerd

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    LOL! So true!
     
  18. Huddler

    Huddler VIP Whale

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    Great pics Joe! Thanks for sharing!
     
  19. DeMoN2318

    DeMoN2318 The DERS

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    Yea I'm 23...first "advanced" calculator I bought was a TI-89 in 2005 for my 10th grade Advanced Algebra II class ($130!!)...I wish I knew you werent allowed to use the 89 in high school courses...
     
  20. Joe

    Joe VIP Whale

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    Gawd, I feel old.
     
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