An astronomer at the University of Hawaiʻi at Hilo is using data from the Canada–France–Hawaiʻi Telescope (CFHT) on Maunakea to help reconstruct a slow-motion cosmic collision, one that has been unfolding for hundreds of millions of years. A new study from principal investigator R. Pierre Martin, a professor of astronomy at UH Hilo, and international researchers such as Ph.D. student Camille Poitras and colleagues at Université Laval in Québec, Canada, simulates the past, present, and future of two spiral galaxies, NGC 2207 and IC 2163.