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Thread: Moon

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    Moon

    Jezza Bear and Al Bear Einstien were having a late night cup of cocoa discussing orienteering when Al Bear said "OK JB, without using a compass, stand at and look out of my study window and tell me approximately which direction you will be facing?"

    JB scratched his head "Gosh, what direction will I be facing?"
    Jerry

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    Re: Moon

    That's not last night's moon.

    From my window, the moon can vary about 40 degrees in the sky throughout the year.

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    Re: Moon

    The trick to this puzzle is it doesn't matter if it was last night or in 2 months time <img src=/S/evilgrin.gif border=0 alt=evilgrin width=15 height=15>
    Jerry

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    Re: Moon

    With the sliver of the moon so thin, it must be almost new or just past new. At any rate it is very close to the sun. So it must be just before sunrise or just after sunset. Normally that would be east or west. I'm not sure whether late night cup of cocoa would be sunrise or sunset, So I can't say whether it would be east or west. johbot brings up a good point. Over the course of the year, that point will vary north and south of true east or west. This is especially true of the far north or far south, where it can become almost meaningless. My guess for the correct answer would be east since the crescent is open to the right.

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    Re: Moon

    <img src=/S/nope.gif border=0 alt=nope width=15 height=15> Sorry
    Jerry

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    Re: Moon

    Well, the crescent can be 'open' to the right or the left, but I'm going to guess at <span style="background-color: #FFFF00; color: #FFFF00; font-weight: bold">west</span hide> unless you done something crafty like <span style="background-color: #FFFF00; color: #FFFF00; font-weight: bold">turn the window upside down</span hide>...

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    Re: Moon

    <img src=/S/whisper.gif border=0 alt=whisper width=29 height=17>...and in case you are wondering why you are not getting notifications, mail to you from wopr.com is being detected as spam...

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    Re: Moon

    OK, It's late at night but the sky is still light, so Jezza Bear and Al Bear Einstien are a long way from the equator. This is confirmed by the fact that the moon's crescent is well up on its side - close to the equator, it's ends would be (near) horizontal. Given that it's late at night, rather than early in the morning, the lit side of the moon has to be facing west, not that that matters much since, depending on the hemisphere, Al Bear Einstien could be facing roughly north or south. And the sky is all wrong - it's lighter towards the horizon rather than being lighter on the left (ie the lit side of the moon).

    So, with the information given, all I can say for sure about the direction is its 'outside'.
    Cheers,

    Paul Edstein
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    Re: Moon

    I think you can have the [choccy bar] for your answer.

    I suppose I should have confirmed that the Magic Forest was in the northern hemisphere as this answer is only valid there but would be good to work out the answer for the south.

    The answer is that JB would have been facing roughly <span style="background-color: #FFFF00; color: #FFFF00; font-weight: bold">North</span hide>. By drawing an imaginary line joining the tips of a crescent moon and extending the line it will cross the Pole Star (North Star).

    This is an indicative bearing used in survival navigation.
    Jerry

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    Re: Moon

    Magic Forest - what Magic Forest?!!!
    Cheers,

    Paul Edstein
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    Re: Moon

    Where Jezza Bear and Al Bear Einstien live of course <img src=/S/laugh.gif border=0 alt=laugh width=15 height=15>
    Jerry

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    Re: Moon

    Hmmm. Can the moon be in the North if you are in the northern hemisphere?

    Anyway, I'm intrigued by your answer, but it only indicates you are facing North if you are facing North! Can the imaginary line rule be used to indicate you are facing East, for example?

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    Re: Moon

    <img src=/S/shrug.gif border=0 alt=shrug width=39 height=15> Don't know Gov.

    This is where I got the information http://www.edibleplants.com/month/moonorth.htm
    Jerry

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    Re: Moon

    It occurred to me after I got to work today that the answer would be north. But there is a catch. You have to be VERY far north in the northern hemisphere for this to be true, as in Arctic Circle north. What Jezza says is true about the line pointing to the north star, but the diagram can be misleading. The moon is a half degree in size and the North Star is up to 90 degrees from it, or 180 diameters away, not the three or so that the link he refers to shows. Re-drawing with the line extended the correct amount would make the north star at least a dozen window widths to the left (and many more higher).

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    Re: Moon

    I know this is an old post now but I thought that I would check this little theory out and so over the past couple of nights I have gone out into the garden to take some bearings. The delay has been more so that I can have a nice crescent moon similar to the image above.

    It is well known that lining up the outer edge stars of ursa major/Big Dipper/the Big Bear/The Plough and drawing an imaginary line along the two, you will eventually find the North Star, this is fine on a clear night and or the constellation is well above the horizon, it is good to use it in conjunction with the crescent moon method as the eye can easily "veer" of to a bright star.

    I cross referenced this with the moon method and now I can without doubt spot the North Star with absolute confidence, it will also help if it is pitch black and I cannot read my compass <img src=/S/grin.gif border=0 alt=grin width=15 height=15>

    Anyway, a little image never goes amiss and I thought I would add it as an addendum.

    PS I have also noted that the original puzzle is only indicative because when I took bearings last night the moon was in fact at a bearing of 340 degrees!!!!
    Jerry

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