Everything in the Universe has gravity – and feels it too.
as it has been called, necessary to explain the acceleration is many orders of magnitude smaller than what quantum theory predicts.
If yes, then why is its gravity so much weaker than predicted? If the vacuum does not gravitate at all, what is causing the cosmic acceleration? These assumptions are baked into scientists' standard cosmological theory, called the lambda cold dark matter model – suggesting there is 70 percent dark energy, 25 percent dark matter, and 5 percent ordinary matter in the cosmos. And this model has been remarkably successful in fitting all the data collected by cosmologists over the past 20 years.
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