Anonymous
Anonymous asked in Science & MathematicsAstronomy & Space · 1 decade ago

How can Space bend if Space is actually nothingness ?

Gravity was defined by the great Einstein as the bending of Spacetime. But how can Space bend if Space is nothing ?

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  • 1 decade ago
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    Space is man's conception of the freedom of movement that we have. Our freedom of movement is affected by gravity. So it so happens that if you can change your coordinate system around a massive object by a smooth continuous function then the effect of gravity can be nicely determined by this change. Space is man's creation, so it is our manipulation of how we measure things that is "bending" here. Look into the mathematics of changing coordinate systems from inertial to accelerated frames. Now the inevitable argument here is that you can empirically "feel" space and so some wonder how does what we feel as "space" bend. That is not the issue with GR, or SR. The issue, like in Quantum Mechanics, is how do we measure "things" in this empirical space. Gravity is not understood yet, it is more predictable now with GR but the HOW?? is still not understood (at least not in my area).

  • 1 decade ago

    Space exists. It is real. It is not nothing, it is something, we just can't see it.

    If there were no Space, then the planets and stars would keep falling and falling for all eternity. Space is holding us up. The heavier a planetary object weighs, the more it bends space, and THAT is gravity.

    The Sun contains 99.8% of all the mass of our solar system so it massively bends spacetime, which is a fabric but we can't see it but it is there.

  • 1 decade ago

    Easy - space doesn't bend space. Matter bends space.

    Einstein's general relativity was once stated thusly:

    "Matter tells space how to bend, and space tells matter how to move"

  • Anonymous
    1 decade ago

    I gather that space is not nothing but is a medium of some kind.

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