Dr. Martini explains how astronomers now calculate the expansion of the universe and why the expansion is accelerating. He is the Instrument Scientist for one of the most advanced astronomical surveys of the century: the Dark Energy Spectroscopic Instrument (DESI). The DESI This highly anticipated project launches unique technology and its massive data is expected to produce the foundation of a “new physics.” Image: [Belmont Media Center](http://scienceforthepublic.org/cosmos/explaining-and-measuring-the-expanding-universe)
Dr. Martini's research focus is observational cosmology and the formation and evolution of galaxies and supermassive black holes. He has served as Instrument Scientist in the design and testing of DESI. He is a rare scientist able to combine engineering and research skills.