"Redshift Drift: A Revolutionary Method for Measuring the Universe's Expansion Rate"
Scientists propose a new method to measure the expansion rate of the universe called redshift drift. Currently, the expansion rate can only be measured in the present, but redshift drift allows for the observation of the evolution of cosmic expansion over time. The Extremely Large Telescope (ELT) is expected to be able to observe redshift drifts in the future. In the meantime, researchers suggest using gravitational lensing to detect distant lensed galaxies with multiple images, which would provide snapshots of the galaxy separated by years or decades and enable the measurement of redshift drift.