Thread: Alien Planet
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Old 06-06-2007, 05:52 PM   #17
worth
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Well, technically speaking some things do travel faster than light.

The universe is 14 billion years old.

But the universe is also 126 billion light years across.

Therefore, if we started from a single point in space, aka the big bang, and 14 billion years later we are 126 billion light years across, how did it get to be that big?

The universe is ever expanding. It's like a loaf of rising bread, and the galaxies in it are the rasins in the bread. As the universe expands, the galaxies are pulled apart from each other.

I was actually quite shocked when I found out the universe was over 100 billion light years across. Boggled my mind because I knew the universe was only 14 billion years old.

Now that example is a little different than matter. Physics as we know it is based on the principal of the speed of light being a constant in a vaccuum, and matter can only infinitley approach the speed. I believe experiments have been done to try to go over the speed of light, but in doing so, we would probably have to rewrite some textbooks.

Time dialation and other forces when traveling near the speed of light are enormous. I couldn't imagine the difficulties if your traveling faster than the speed of light. It doesn't seem realistic to me either.
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