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Thread: How fast are we really moving ?

  1. #1 How fast are we really moving ? 
    Forum Professor leohopkins's Avatar
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    The earth spins at around 1000 miles per hour;
    It travels round the sun,
    Our galaxy is rotating,
    The universe is expading.

    My question is simply; roughly how fast are we really moving through space ?


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  3. #2  
    Forum Isotope Zelos's Avatar
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    first: please use SI units
    secondly it all depends on relative to what
    since in our referensframe we are standing still we can just as well say that everything else is moving around us and away from us.
    Thats not the case but it appear so.

    you cant calculate with the expansion since its depended on the distance but if you can calcualte if you want the speed with around the sun and around the galaxy toghater
    around the galaxy ~ 300km/s
    around the sun ~30km/s

    then again this depends on when on the year since atleast once a year we rotate in the direction of the galaxy and at another point we rotate against it around the sun


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  4. #3  
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    we do have a pretty good cumulative rate of speed and they are based on our being motionless.

    i will argue, we are not moving away to all things and what we are moving away from will not be or has not been before.

    nothing in the solar system is going anywhere and in time will all be part of the sun. the systems rotating around the core of the Milky Way seem to be traveling in some order, not as the solar system, but not spreading. we also have two dwarf galaxies that will join the MW with in a few million years and Andromeda Galaxy is heading our way. likewise we have no idea where the limits of the Universe are and only some questionable interpretations of observance to suggest the expansion theory.
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  5. #4 Re: How fast are we really moving ? 
    Forum Freshman Crabby's Avatar
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    Quote Originally Posted by leohopkins
    The earth spins at around 1000 miles per hour;
    It travels round the sun,
    Our galaxy is rotating,
    The universe is expading.

    My question is simply; roughly how fast are we really moving through space?
    I think he asks a good question. When Zelos responded:

    then again this depends on when on the year since atleast once a year we rotate in the direction of the galaxy and at another point we rotate against it around the sun
    I have to ask if this really makes much difference. For starters, all of the angles of rotation must be factored into the analysis. Then I would have to ask if galactic rotation and cosmic expansion are vastly greater than the local velocities of Earth's motions. Is there a way to answer leohopkins' question in simple terms of velocity? Or does it become relativistic at some point in spacetime?

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  6. #5  
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    guess i should have mentioned this earlier; the earth moves at 20 mps, around the sun. this is 72,000 miles per hour. if you think thats fast try mercury which moves over 100,000 mph.

    yes, this speed is relevant to a number of things. for one thing our orbit to be maintained requires it. the cumulative speed of all the movements may have relevance to many theory, that were conceived prior to this knowledge.
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  7. #6  
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    You can find the definitive answer here, as well as the answers to a few other questions.


    http://dingo.care-mail.com/cards/flash/5409/galaxy.swf

    Especially for Zelos that one...
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