A measurement of the cosmic expansion within our lifetime

Abstract The most exciting future observation in cosmology will feature a monitoring of the cosmic expansion real time, unlike anything that has ever been attempted before. This campaign uncover crucial physical properties various constituents universe, and perhaps answer simpler question concerning whether or not is even accelerating. An unambiguous yes/no response to this query significantly impact cosmology, course, but also standard model particle physics. Here, we discuss—in straightforward way—how understand so-called ‘redshift drift’ sought by campaign, why its measurement help us refine standard-model parameters if ‘yes.’ A ‘no’ answer, on other hand, could be more revolutionary, sense it might provide resolution several long-standing problems inconsistencies our current cosmological models. outcome zero redshift drift, for example, would obviate need constant render inflation completely redundant.