CODEX: Measuring the Expansion of the Universe (and beyond)

CODEX, a high-resolution, super-stable spectrograph to be fed by OWL, the most powerful telescope ever conceived, will for the first time provide the possibility of directly measuring the change of the expansion rate of the Universe with time ... and much more. The concept of this instrument has been studied in a collaboration launched by ESO in July 2004 together with INAF-Osservatorio Astronomico di Trieste, the Institute of Astronomy, Cambridge University, and the Observatoire de Geneve.