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> what if the assumptions are wrong? Dark matter and dark energy are not assumptions. The assumptions are the general relativity and the FLRW metric which is t
by namirez 7y ago
> what if the assumptions are wrong?
Dark matter and dark energy are not assumptions. The assumptions are the general relativity and the FLRW metric which is the solution of Friedmann equations. The assumptions of Friedmann equations are that the universe is homogeneous, isotropic, and a perfect fluid. A perfect fluid means the universe has only a local density and pressure. There are no other assumptions in deriving the FLRW metric.
Even if were to verify these result by direct measurements, we wouldn't be able to send a probe across the universe. Please note that local curvature in the Milky Way or even the Virgo cluster wouldn't say anything about the curvature of the universe at very large scales. We are talking about curvature at scales larger than 100Mpc (more than 300 million light years).