Why Dark Energy Must Exist and Why We Should Have Always Known!|⚛

Einstein was such a genius, that even the idea he called his biggest mistake turned out to be true. It used to be thought that the universe was in a steady state. Basically, it wasn't expanding or contracting. To prevent the universe from collapsing under its own weight Einstein came up with the idea of cosmological constant, today believed to be caused by the mysterious Dark Energy. Which is an idea that there's a negative force counteracting gravity. Then Edwin Hubble came along with the discovery that the universe was expanding, so Einstein threw his cosmological constant out because it wasn't needed in a non-steady universe. Well, it should have been obvious to them even back then that the cosmological constant was still needed. Let me explain why!

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