How can the universe be speeding up in its expansion? Since gravity is the only force that controls wouldn’t the universe ultimately always contract again over time because gravity would eventually win out over the initial acceleration caused by the big bang?
In: Physics
Imagine a rubber band, one that you can stretch forever and won’t pop. Now put two ants on the rubber band walking towards each other. If you don’t do anything, the ants will meet in the middle. If you slowly stretch the rubber band, the ants will still meet but will take longer. If you stretch the rubber band fast enough, they’ll get further and fruther apart and never meet, until you get bored of stretching and stop.
Something is stretching the universe which is why the universe is speeding up its expansion. There are theories which other posts include, but I’m not sure how much of it is agreed upon and how much of it is possible explanations still awaiting experiments to verify them.
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