Within the Department of Physics, the Leonard E Parker Center for Gravitation, Cosmology and Astrophysics (CGCA) pushes the frontiers of astrophysics research through novel use of observation, theory, and computation. The group is both broad and deep, with twelve senior researchers including seven faculty (Patrick Brady, Philip Chang, Jolien Creighton, Dawn Erb, David Kaplan, Sarah Vigeland, and Alan Wiseman), two Distinguished Professors Emeriti (John Friedman and Leonard Parker), one Adjunct Professors (Bruce Allen), and one Visiting Scientist (Maria Alessandra Papa). The researchers are joined by research scientists, postdoctoral research associates, as well as graduate and undergraduate students. By bringing together expertise in gravitational physics, observations, data analysis, and computing, they address scientific challenges in relativistic astrophysics, time-domain astrophysics, gravitational-wave/multi-messenger astronomy, galaxy formation/evolution, and cosmology.