scientists have found that over the 9 billion years of human existence, the galaxy has begun to expand. It is not that the planets are moving away from one thing that is in the center, but that everything is expanding away from everything, which would mean in a long time the world would freeze since the sun would be so far away. Using x rays to trap this dark energy that is going through the earth constantly, scientists can attempt to trap some dark matter and figure out whether or not it is what is causing everything to expand. However, it is really hard to find the right thing so it could take scientists a really long time to figure out.
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