Supercomputer Simulation of the Universe

Discussion in 'Current Events' started by MacSA, Jun 2, 2005.

  1. MacSA macrumors 68000

    MacSA

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    #1
  2. combatcolin macrumors 68020

    combatcolin

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    #2
    Watched this on Newsnight, they had to turn off their supercomputer to everyone apart from the team involved and it still took a month to crunch the numbers.
     
  3. bartelby macrumors Core

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    #3
     
  4. ZLurker macrumors regular

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    #4
    Anyone seen what kind of computer/cluster they are using?
     
  5. AppleAce macrumors regular

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    #5
    And what answer did they get?

    42.

    Sorry, couldn't resist. :p Seriously, though, that's some pretty intersting stuff.
     
  6. Mr. Anderson Moderator emeritus

    Mr. Anderson

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    #6
    Thought the same thing myself. Great stuff - and its amazing how organic it looks :D

    But what are the Mpc/h and Gpc/h units? I'm guessing the Mpc and Gpc are mega and giga parsecs but I'm lost as to the "/h"

    D
     
  7. barneygumble macrumors 6502a

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    #7
    /h per hour perhaps a parsec is a distance

    Parsec: A unit of astronomical length based on the distance from Earth at which stellar parallax is one second of arc and equal to 3.258 light-years, 3.086 × 1013 kilometers, or 1.918 × 1013 miles.

    it makes sense to me
     
  8. Mr. Anderson Moderator emeritus

    Mr. Anderson

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    #8
    that makes sense, but wow, that's some fast zooming :D

    it was just the Mps and Gps that got me confused I guess.

    D
     
  9. barneygumble macrumors 6502a

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    #9

    it is astonishingly quick, i wonder how quick that computer would be at Seti@home. It would pumpout units every 10 seconds if that.
     
  10. tpjunkie macrumors 65816

    tpjunkie

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    #10
    it couldn't be per hour; how could anything travel a million or billion parsecs in an hour, when it takes light itself 3.258 years to travel a single parsec? That would be a ridiculous violation of relativity.

    I think h is standing for Planck's constant, which carries either electron volts or or joules multiplied by time as its units, which makes sense, as the projected slices are density fields for matter distibution, so Mpc/h would give you a distance/energy*time.
     
  11. barneygumble macrumors 6502a

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    #11
    what would i know,i'm not an astrophysicist
     
  12. Apple Hobo macrumors 6502a

    Apple Hobo

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    #12
    I think they used this IBM setup. 4.2 teraflops.
    --------------------------------

    If you want to feel really insignificant, watch that "Slow flight" video. :eek:

    By the way, was anyone able to download the 280MB poster on the page? It's been showing up as "Not Found" since this afternoon.
     
  13. combatcolin macrumors 68020

    combatcolin

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    #13
    They had a TB of RAM :eek: and even that was not enough as the OS took a chunk and the computer could not count a figures high enough, the lead programmer had to fudge the system to get it to do what the team wanted - while the program was running.

    Somewhat scary if he messed up and crashed it!

    Think it might have been a clustered 32bit affair, as a 64bit setup can count massive figures.
     
  14. Pinewater234 macrumors newbie

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    #14
    The 'h' in Mpc/h

    In "Mpc/h" and "Gpc/h", the h is the Hubble parameter. It is a measure of the rate of expansion of the universe, and it changes as the universe evolves. Astrophysicists include it in the units because there is some uncertainty as to its exact value.

    Here's a reference on it: http://hyperphysics.phy-astr.gsu.edu/hbase/astro/hubble.html

    :)
     
  15. localoid macrumors 68020

    localoid

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    #15
    Upon reading the thread's title, I had high hopes someone had finally discovered proof that the universe is a computer simulation, running on a supercomputer from the future.

    Drat! :(
     
  16. Eclipse278 macrumors regular

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    #16
    Not yet, it's still only mathematically probable right now.
     
  17. Don't panic macrumors 603

    Don't panic

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    #17
    you are not supposed to tell.
    i might have to report you
     
  18. Mousse macrumors 68000

    Mousse

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    #18
    I always assumed you guys were NPC's in a simulation I'm playing.;) Species human in the Milky Way section of the Eternal Sphere virtual world.
     
  19. rdowns Suspended

    rdowns

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  20. iJohnHenry macrumors P6

    iJohnHenry

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    #20
    Yes.

    The latest game seems to be dragging old threads from the grave, and attempting to breath new life into them.

    To that end, someone needs a CPR upgrade. :)
     
  21. joepunk macrumors 68030

    joepunk

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    #21
    Cool pics and vids. I didn't know about this until the resurrection of the thread.
     

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