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Thread: Direction In Space !!

  1. #1 Direction In Space !! 
    Forum Senior Yash's Avatar
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    Can we give any kind of direction in space, like we have on earth"N S E W", i don't think so, what are your thoughts.
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  3. #2  
    Forum Sophomore Cuntinuum's Avatar
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    Well, you would need a way to define the directions, so, you could always use our sun as the origin since you couldn't use Earth's magnetic fields for direction. Depending on where Earth is in the year you could support the directions with it? Or you could use the constellations. I don't know how reliable that'd be if someone were to go far out in space.


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    The Doctor Quantime's Avatar
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    Seeing sa everything in the galaxy moves at nearly the same speed, aka velocity, then yes. You could then apply that motion to the universe after observing the motion of a lot of other objects in the starry sky .
    "If you wish to make an apple pie from scratch, you must first invent the universe". - Carl Sagan
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    Forum Professor sunshinewarrior's Avatar
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    Quote Originally Posted by 425 Chaotic Requisition
    Seeing sa everything in the galaxy moves at nearly the same speed, aka velocity, then yes. You could then apply that motion to the universe after observing the motion of a lot of other objects in the starry sky .
    Ummm...

    The Milky Way galaxy is rotating. Therefore the velocities (speed + direction) of its stars/starsystems vary, and in some cases can be directly opposed to each other.

    At best we might use earth's 'current' orientation (the plane of the ecliptic, really) to define north and south for the entire universe. But we can only do this as a convention within which we recognise that it is, scientifically, meaningless and unwarrantedly privileges our position on the earth.

    It is worth reiterating:

    1. There is no centre to the universe

    2. There is no fixed point in the universe

    3. There is no single perfectly inertial frame of reference in the universe

    No matter what our desires, there are some matters regarding which we must admit that amelioration is not an option.

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  6. #5  
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    Focusing on our own solar system, we know that our planets orbit the sun and take x amount of time to do so, so could we not use dere positions, at certain times to gauge direction from the sun? or do the planetary orbits vary, if is so, forget dat!!!
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  7. #6  
    Forum Professor sunshinewarrior's Avatar
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    Quote Originally Posted by wandrug
    or do the planetary orbits vary, if is so, forget dat!!!
    They do vary, alas. Besides, which planet would you pick? They'll never stand still.
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  8. #7  
    The Doctor Quantime's Avatar
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    There is because I say there is. I am the third observor, and I've had enough of people putting brick walls in front of me and others. In my theory your brick wall has already been smashed.
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    yes but could u not say dat evey 3 months the earth will be in a certain position relevant to the sun, and year after year the position of da earth at these 3 month stages will not change dramatically, so could u use the earths position, at periodic intervals, relevant to the sun to gauge some kind of direction, albeit on one plane.
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  10. #9  
    Forum Professor sunshinewarrior's Avatar
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    Quote Originally Posted by wandrug
    yes but could u not say dat evey 3 months the earth will be in a certain position relevant to the sun, and year after year the position of da earth at these 3 month stages will not change dramatically, so could u use the earths position, at periodic intervals, relevant to the sun to gauge some kind of direction, albeit on one plane.
    Again, you'd have to do it by convention. What you could do is something like this:

    1. Decide on a particular second in time.

    2. At that time, mark the various measures - distance of earth from sun, orientation regarding the line from the earth to the sun (notional), orientation regarding the movement of the earth in relation it's own axis (using the position of the sun as a fixed point).

    3. Declare that this is 'universal position number 1' (and try to stop people sniggering about kama sutra jokes), and everything will be measured from this point.

    4. Suffer death by lapidation (or by the thousand cuts) as scientist afdter scientist heaps opprobrium upon you because from one moment to the next you cannot tell exactly where your reference position was! Is it behind you? With regard to the sun, the greenwich meridian, the Milky Way galaxy, the local group what? Where was that position?

    So no, I don't think there's such a thing as a universal position that we can use. I could be wrong.

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  11. #10  
    Forum Masters Degree SuperNatendo's Avatar
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    Directions are relative. If we stay within our solar system, we could orient ourselfves in relation to the sun.

    If we become a galaxy faring civilization, then we could orient ourselves in relation to the galaxy, divide it into quadrants.
    "It's no wonder that truth is stranger than fiction. Fiction has to make sense." - Mark Twain
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  12. #11  
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    direction and position? isn't that astrology?
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    Administrator KALSTER's Avatar
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    I think modern space probes already use certain stars for tracking. It would make most sense to choose a star or an assortment of stars that are within the frame of reference you will be moving in. So in knowing exactly where you are in relation to these markers in the desired reference frame, your motion would also be optimized. Or you could have markers in each reference frame that you will be moving through, and so you could plot a more direct an efficient course to your destination.
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  14. #13  
    Forum Senior Yash's Avatar
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    Quote Originally Posted by KALSTER
    I think modern space probes already use certain stars for tracking. It would make most sense to choose a star or an assortment of stars that are within the frame of reference you will be moving in. So in knowing exactly where you are in relation to these markers in the desired reference frame, your motion would also be optimized. Or you could have markers in each reference frame that you will be moving through, and so you could plot a more direct an efficient course to your destination.

    There are countless stars in our galaxy as well as universe !! So, marking stars as fixed point, also the direction of the earth continuously changes, so marking stars, as to find a fixed direction is not gona help us!! Thats what i think !! :-D
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  15. #14 Re: Direction In Space !! 
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    Quote Originally Posted by Yash
    Can we give any kind of direction in space, like we have on earth"N S E W", i don't think so, what are your thoughts.
    Please Share!! 8) 8)
    We could use the same type of objects to determine our positions in the universe as the ships use.

    They are the distant stationary stars.
    But instead of the stars, we substitute the very deep galaxies with the highest redshifts. These will be stationary objects to use for navigating.

    Cosmo
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