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Originally Posted by Timo
It'd probably accelerate, then get stuck in t'middle. That's the centre of gravity (in our little region of space) so it'll be pulling everything toward it.
Otherwise the aussies would fall off the planet. :D
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I hate you, gravity! I HATE YOU!
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Or would you simply float in the middle (zero gravity), if it were possible to create an open tunnel?
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The gravity has to affect the tunnel too, because it is "a part" of earth now.
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The pressures and heat would be immense though, so making a tunnel that remains 'open' would be - currently - far beyond impossible. Diamond melts at 3800K, while the centre of the Earth is allegedly 5000-7000K, so even if the tunnel was made of diamond it would still melt.
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At first I thought you implied I was made of diamond. Besides the tunnel is made of space. Otherwise you couldn't travel through it.