Speed of the expansion
Imagine you throw a ball up in the sky, but instead of coming down, it slows for 1 sec and then shoots off in space like a rocket. What will be your reaction?
Scientists had the same reaction when they discovered that the expansion of the universe is speeding up very fast.
Because it was thought to be slowing down but it has always been speeding up.
Physics is so astonishing.
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Dark matter, theory of relativity, dark energy, negative mass, end of the universe, The Big Bang, 'What is beyond the universe?' etc. If you love such things, Welcome to your home.'
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