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Gravity is an attractive force that affects and is affected by all mass and - in general relativity - energy, pressure, and stress. Prefer newtonian-gravity or general-relativity if sensible.

1 vote

How does universe expand when cosmological constant is zero?

The universe can expand just without a cosmological constant. Assuming the universe to be spatially homogeneous and isotropic, and combining this with the Einstein field equations produces the two Fri …
Dipson Khadka's user avatar