In May 2012, SLU astronomers Aileen O'Donoghue and Jeffrey Miller observed for 4 nights using the 1.8-meter Vatican Advanced Technology Telescope (VATT), located at the Mount Graham International Observatory in Arizona. They were shown the operation of the VATT and its spectrograph by the vice-director of the observatory, Chris Corbally S.J. They used the VATT to observe the spectra of galaxies in order to determine the distance to those galaxies. While at the observatory, O'Donoghue and Miller also visited the other telescopes at Mt. Graham: the University of Arizona's Submillitmeter Telescope (SMT) and the Large Binocular Telescope (LBT), which consists of two 8.4-meter mirrors. The also stopped along the way at the Kitt Peak National Observatory in Tucson, Arizona.